Staffing Companies in London: 3,375 Active Firms (2026)
Staffing companies in London supply temporary and contract workers to hirers across the capital’s business and public-service labour markets.
Buying centres tend to sit with HR, operations, finance/payroll and site management, because the work combines candidate supply with timesheets, onboarding and hirer compliance. A typical fit is a London agency with material UK revenue, an established employer base and coverage across multiple boroughs. Customers are business hirers, public-service organisations and regulated labour users that need ad hoc shift cover, repeat temporary assignments or contractor pools. Engagements are usually volume-led and operational, spanning specialist desks with a narrow role focus through to multi-site providers coordinating payroll and assignment matching across client locations.
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London has 3,375 active trading staffing companies, with 155 reporting more than £5M turnover and 1,080 incorporated since 2022. Reported headcount totals 8,567 employees, giving the cohort a visible payroll footprint alongside its assignment-based labour supply. The shape is split between small specialist teams and a narrower set of multi-site labour providers with enough revenue to manage payroll, compliance and repeat hirer demand at scale.
Temporary staffing sits inside a rules-based labour-supply market rather than a pure brokerage market. The Agency Workers Regulations give agency workers immediate access to hirer facilities and vacancy information, with equal-treatment rights on pay and basic working conditions once the qualifying period is met. Oversight has also shifted, with the Fair Work Agency replacing the former Employment Agency Standards Inspectorate. Labour providers supplying agriculture, horticulture, shellfish gathering, processing or packaging work may need a Fair Work Agency gangmaster’s licence, so agencies serving national client sites need controls that distinguish general recruitment from licensed labour supply.
Future competition appears likely to be shaped less by candidate sourcing alone and more by payroll control, audit trails and repeat hirer relationships. The cohort still looks weighted towards small operators, so pricing pressure tends to persist where agencies compete for similar shift and contract roles. Revenue-scale providers appear better placed to absorb compliance work, but they also face more scrutiny from hirers that want evidence on worker rights, onboarding and timesheet governance. Consolidation is plausible in the middle of the market, particularly where specialist labour desks need broader client coverage without losing local candidate networks.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
3,375
Active firms
2026
155
Above £5M turnover
London cohort
1,080
Incorporated since 2022
London cohort
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Key facts
About 4% of the trading cohort reports turnover above £5M (155 of 3,375 firms) — the rest sits below that revenue band.
32% of the cohort was incorporated since 2022 (1,080 firms), so a sizeable share is in its first few filing cycles.
Agency Workers Regulations 2010 give agency workers access to hirer facilities and vacancy information from day 1, then equal treatment on pay and basic working conditions after a 12-week qualifying period in the same job.
Labour providers in agriculture, horticulture, shellfish gathering and associated processing or packaging may need a Fair Work Agency gangmaster’s licence under the Gangmasters (Licensing) Act 2004.
Recruitment-sector GVA was estimated at £40.6 billion in 2024, down from £44.4 billion in 2023.
On any given day in 2024, 872,000 temporary or contract workers were on assignment, down 17.6% year on year, with the average temporary assignment length falling to 18 weeks from 22 weeks in 2023.
Eurostat’s 2024 comparison put temporary employment at 11.0% of EU employment among people aged 15 to 64, equivalent to 22.1 million temporary employees.
Top London Staffing companies
Financial sub-scores
Computed from 4 filingsProvides recruitment and staffing services, sourcing and placing candidates in temporary, contract and permanent roles. Specialises in hospitality, cleaning and facilities positions, matching…
Serves hospitality, cleaning and facilities employers in London hiring temporary, contract or permanent staff, alongside candidates seeking roles in those sectors.
Financial Health
StrongStrong · Growing, Hiring · 41% CAGR over 3y
Location
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Computed from 5 filingsProvides staffing and recruitment services, supplying temporary and contract workers for sectors including logistics and warehousing, security, cleaning, retail, waste management, hospitality,…
Serves London-area businesses in cleaning, events and retail, waste management, security, logistics and warehousing, care, hospitality and catering, alongside candidates seeking industrial and…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides recruitment and staffing services, sourcing and screening candidates for temporary, contract, and permanent roles across multiple sectors. Supports employers with hiring and connects job…
Sells to businesses needing temporary, contract and permanent staff, and to job seekers seeking new roles. Serves employers across multiple sectors, with a clear emphasis on the London recruitment…
Financial Health
WeakWeak · -9% CAGR over 4y
Location
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Computed from 4 filingsOperates an online jobs marketplace and mobile app that connects workers with temporary and flexible roles at partner companies. Provides businesses with recruitment, workforce sourcing, scheduling…
Serves both job seekers seeking flexible local work and businesses needing temporary or flexible staffing, including large delivery and operational employers using workforce optimisation technology.
Financial Health
StrongStrong · Hiring · 142% CAGR over 3y
Location
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Computed from 5 filingsProvides recruitment and workforce supply services, sourcing, training and vetting staff for airports and the aviation sector, as well as hospitality venues, commercial facilities and healthcare…
Serves B2B and public-sector clients including airports and aviation firms, hotels, restaurants, commercial office buildings in London, and NHS trusts across the UK.
Financial Health
StableStable · -0% CAGR over 4y
Location
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Computed from 4 filingsProvides recruitment and staffing services supplying temporary, permanent and ad‑hoc workers to the driving, industrial and construction sectors. Also offers driver CPC training, driver assessments,…
Serves employers needing temporary, permanent or ad hoc staff in the driving, industrial, warehouse and construction sectors, alongside jobseekers seeking roles in those sectors, particularly around…
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
Location
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Computed from 5 filingsProvides recruitment and staffing services, supplying temporary and permanent workers to businesses, particularly in industrial and hospitality sectors. Offers on-site and branch-based recruitment…
Serves B2B clients with temporary or permanent staffing needs in industrial and hospitality sectors, including large companies and smaller local businesses across London, Kent and the Midlands.
Financial Health
StrongStrong · Growing, Hiring · 32% CAGR over 4y
Location
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Computed from 5 filingsSupplies temporary hospitality staff for events and venues, including corporate hospitality, weddings, parties and sports match days. Recruits, trains and schedules staff for flexible shifts and…
Targets London VIP venues, corporate event organisers, wedding and party hosts, match-day operators and hospitality workers seeking flexible shifts.
Financial Health
HealthyHealthy · Hiring · 93% CAGR over 4y
Location
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Computed from 5 filingsProvides recruitment and staffing services connecting employers with job seekers. Lists and fills roles across hospitality, healthcare, aviation, warehouse, security and administrative sectors,…
Serves UK employers hiring staff in hospitality, aviation, healthcare, security, warehousing and cleaning, alongside job seekers seeking full-time, part-time and temporary roles in London and airport…
Financial Health
StrongStrong · Growing, Hiring · 295% CAGR over 4y
Location
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Computed from 5 filingsProvides recruitment services for temporary and permanent roles across sectors including property, scientific, HR, legal, IT, media, and office support. Sources and places candidates in positions…
Serves employers and jobseekers in London and Manchester, especially businesses hiring temporary and permanent business support staff across property, scientific, charity, regulatory, legal,…
Financial Health
WeakWeak · -4% CAGR over 4y
Location
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Computed from 3 filingsProvides recruitment and staffing services for corporate front‑of‑house roles, including receptionists, workplace experience staff, front of house managers and facilities managers, supplying…
Serves B2B clients, mainly London banks, law firms, insurers, consultancies, marketing and tech companies, plus other corporations needing corporate reception, workplace experience and facilities…
Financial Health
StableStable · Hiring · 5% CAGR over 2y
Location
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Computed from 4 filingsProvides recruitment and staffing services, matching candidates with job opportunities across public sector, social housing, healthcare, not‑for‑profit and private organisations. Maintains a pool of…
Serves UK employers and jobseekers across public, private, social housing, health and social care, and not-for-profit sectors, including local authorities, housing associations, NHS bodies, central…
Financial Health
StableStable · Hiring · 16% CAGR over 3y
Location
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Computed from 5 filingsProvides recruitment and staffing services for the catering and events industry, supplying trained waiters, bartenders, and event staff for functions and hospitality venues, and offering temporary…
Serves London event organisers, venues, corporate hosts and private clients needing catering and hospitality staff for events; also targets individuals seeking flexible event work.
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 4y
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Computed from 3 filingsProvides temporary healthcare staffing and recruitment services, supplying registered nurses, care assistants and support workers to nursing homes and care providers, and arranging staff to support…
Serves B2B healthcare providers, including nursing homes and organisations needing temporary care assistants, support workers and registered nurses across London, Surrey, Sussex, Kent and the South…
Financial Health
StrongStrong · Hiring · 60% CAGR over 2y
Location
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Computed from 5 filingsProvides hospitality staffing and outsourcing services for hotels, supplying housekeeping staff and operational support. Offers temporary recruitment and teams for cleaning, laundry, maintenance, and…
Serves B2B hospitality clients, primarily luxury and renowned hotels in London, including hotel groups needing flexible staffing and outsourced operational support.
Financial Health
StableStable · -1% CAGR over 4y
Location
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Computed from 3 filingsProvides recruitment and staffing services for hospitality, catering, cleaning, and security operations. Supplies supervisors, managers, chefs, cooks, general assistants, and SIA‑licensed security…
Serves businesses across London needing staffing support, particularly contract cleaning and catering operators, premium hospitality venues, industrial food production sites, event companies and…
Financial Health
WeakWeak · -7% CAGR over 2y
Location
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Computed from 5 filingsProvides recruitment and staffing services, supplying temporary, contract and permanent workers including nurses, care assistants, cleaners and support staff to healthcare, hospitality, education,…
Serves UK employers needing temporary, permanent or contract staff, especially healthcare providers, hospitality businesses, education institutions, local government offices and retail companies.…
Financial Health
StableStable · Hiring · 96% CAGR over 4y
Location
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Computed from 5 filingsProvides recruitment and staffing services, placing candidates in temporary, contract and permanent roles. Focuses on commercial, office, industrial and logistics sectors, sourcing, screening and…
Serves businesses hiring temporary, contract and permanent staff in commercial, office, industrial and logistics roles, alongside jobseekers seeking work in those sectors.
Financial Health
StableStable · -16% CAGR over 4y
Location
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Computed from 3 filingsProvides recruitment and labour supply services for infrastructure and construction sectors. Supplies temporary and permanent management, engineering and trade staff for rail projects, signalling,…
Serves B2B employers and contractors in rail, signalling, renewable energy, M&E and construction, including London Underground, Network Rail, Crossrail contractors and firms on commercial,…
Financial Health
StableStable · -23% CAGR over 2y
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Computed from 3 filingsProvides recruitment and staffing services for employers across sectors including HGV driving, industrial, construction, education, healthcare and commercial roles. Sources, screens and places…
Serves London employers and public sector bodies needing temporary or permanent staff across HGV/driving, industrial, commercial, construction, education, healthcare and local authority roles.
Financial Health
WeakWeak · -29% CAGR over 2y
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Computed from 5 filingsProvides recruitment and temporary staffing services for the hospitality sector, supplying front‑of‑house and back‑of‑house personnel such as waiters, bartenders, chefs, kitchen porters, banqueting…
Serves hotels, venues, caterers and other hospitality businesses in Central London, alongside hospitality workers seeking casual front- and back-of-house shifts.
Financial Health
HealthyHealthy · -7% CAGR over 5y
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Computed from 4 filingsProvides temporary and permanent staffing and recruitment services, supplying drivers, warehouse operatives, cleaners, hospitality staff and airside personnel to logistics, industrial and service…
Serves businesses in logistics, warehouse operations, industrial, hospitality and airside environments that need temporary or permanent workers, including cleaners, drivers and operational staff.
Financial Health
DistressedDistressed
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Computed from 4 filingsProvides recruitment services for employers and jobseekers, placing candidates into temporary and permanent office-based roles including administration, HR, finance, customer service, marketing and…
Serves SMEs and global employers across Kent, South East London and the City hiring office-based staff, plus candidates seeking temporary and permanent roles in administration, HR, finance, housing,…
Financial Health
StableStable · -9% CAGR over 3y
Location
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Computed from 5 filingsProvides recruitment and staffing services, supplying temporary and permanent professionals including doctors, nurses, allied health staff, social care workers, educators, and administrative…
Serves public and private sector employers across the UK needing temporary and permanent staff, especially healthcare, social care, education, administration, construction and hospitality…
Financial Health
StrongStrong
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Computed from 2 filingsProvides recruitment and staffing services, placing temporary, permanent, and contract workers with employers. Specialises in sectors including construction, rail, education, healthcare, logistics,…
Serves UK employers needing temporary, permanent and contract staff, plus jobseekers seeking roles across rail, construction, education, healthcare, social care, logistics, finance, IT, hospitality…
Financial Health
HealthyHealthy · -18% CAGR over 1y
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Computed from 3 filingsProvides recruitment and staffing services for construction, property, energy and industrial sectors, including senior appointments, blue‑collar labour supply, international placements and payroll…
Serves construction, industrial, property and energy employers, as well as jobseekers from blue-collar operatives to senior appointments, including candidates for international placements.
Financial Health
HealthyHealthy · Hiring · 26% CAGR over 2y
Location
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Computed from 3 filingsProvides temporary crew and technical staff for events and productions, including riggers, stage builders, forklift drivers and general labour. Supports concerts, conferences, sports events, TV and…
Serves event industry businesses across the UK, including organisers and production teams for corporate awards, conferences, concerts, sports events, TV and film sets, plus clients needing warehouse…
Financial Health
WeakWeak · 0% CAGR over 2y
Location
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Computed from 5 filingsProvides recruitment and staffing services, supplying temporary, contract and permanent workers to businesses. Sources and places staff for roles including warehouse, construction, catering,…
Serves UK employers needing temporary, contract, temp-to-perm and permanent staff, including hospitals, care homes, charities, hotels, caterers, councils, schools, construction firms, warehouses and…
Financial Health
WeakWeak · -6% CAGR over 4y
Location
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Computed from 5 filingsProvides driver recruitment and training services, supplying temporary and permanent LGV (HGV) drivers and operational staff to transport and logistics businesses, including haulage, distribution,…
Serves transport and logistics businesses in London and the South East, including haulage, palletised freight, courier, builders’ merchant, drinks, chilled food, removals and specialist fleet…
Financial Health
StrongStrong · Hiring · 38% CAGR over 5y
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Computed from 5 filingsProvides healthcare staffing and recruitment services, supplying vetted agency nurses and other healthcare professionals to NHS trusts, private hospitals, care homes, prisons, and mental health units…
Serves NHS trusts, private hospitals, nursing homes, prisons, and mental health and learning disability units across the UK needing compliant healthcare staffing.
Financial Health
DistressedDistressed
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Computed from 5 filingsProvides recruitment and staffing services for employers and jobseekers, specialising in transport and logistics, industrial, and commercial sectors. Offers temporary, temp‑to‑perm and permanent…
Serves UK employers in transport, logistics, industrial and commercial sectors, especially businesses needing temporary, high-volume, onsite or permanent staffing support, alongside candidates…
Financial Health
HealthyHealthy
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Computed from 5 filingsProvides recruitment and staffing services for businesses, placing temporary, contract and permanent staff. Specialises in logistics, warehouse, transport, commercial office, engineering and…
Serves businesses of all sizes needing temporary, contract, office, warehouse, logistics, engineering, manufacturing, HGV and senior management staff, plus candidates seeking roles in those sectors.
Financial Health
StableStable · Hiring · 32% CAGR over 4y
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Computed from 3 filingsProvides recruitment and labour supply services for the construction industry, placing blue‑collar tradespeople and white‑collar staff. Supplies temporary and permanent workers including labourers,…
Serves UK construction companies and contractors needing blue-collar operatives, trades, site support, security, cleaning, crane teams, administrative and commercial staff for temporary or permanent…
Financial Health
StrongStrong · Hiring · 22% CAGR over 2y
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Computed from 5 filingsProvides recruitment and staffing services, sourcing and placing candidates in temporary, permanent and contract roles. Recruits for office and professional positions including administration,…
Serves employers and job seekers across West London, Middlesex, Buckinghamshire and Berkshire, covering temporary, permanent and contract office roles in administration, finance, HR, sales,…
Financial Health
WeakWeak · -14% CAGR over 4y
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Computed from 5 filingsProvides recruitment and staffing services supplying temporary labour, contract staff, and permanent placements across sectors including construction, engineering, healthcare, IT, and business…
Serves employers across Europe seeking temporary labour, permanent placements and managed workforce support, especially in construction, engineering, healthcare, financial services, administration,…
Financial Health
StrongStrong · Growing, Hiring · 172% CAGR over 4y
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Computed from 5 filingsProvides recruitment and temporary staffing services, supplying HGV drivers, industrial workers and logistics professionals to haulage, logistics and commercial businesses. Offers on-site workforce…
Serves UK employers needing temporary and permanent staffing, especially hauliers, logistics operators, industrial organisations, blue-chip companies and SMEs, plus jobseekers seeking driving,…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
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Computed from 5 filingsProvides recruitment and staffing services, supplying temporary and agency workers to businesses in sectors including construction, driving, manufacturing, technical, commercial, warehouse and…
Serves businesses needing agency labour across commercial, construction, driving, manufacturing, production, technical, warehouse and industrial roles, alongside jobseekers and temporary workers…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
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Computed from 5 filingsProvides temporary staffing and recruitment services, supplying workers to client organisations. Handles worker sourcing, placement and onboarding, and oversees compliance processes and employment…
Serves business clients that hire temporary workers through agency or labour-supply arrangements; specific industries and geographies are not stated.
Financial Health
HealthyHealthy · -47% CAGR over 4y
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Computed from 5 filingsProvides recruitment and staffing services, supplying temporary and permanent workers to businesses. Specialises in roles across driving, industrial, manufacturing, warehouse, distribution, retail,…
Serves UK employers needing temporary, contract and permanent staff, from occasional users to high-volume global and local companies, especially in industrial, warehouse, distribution, logistics,…
Financial Health
HealthyHealthy · -4% CAGR over 4y
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Computed from 5 filingsProvides recruitment and employment placement services, sourcing and screening candidates for temporary, part-time and permanent roles. Manages applicant verification, background checks,…
Serves employers in and around London needing vetted gig, part-time, full-time or permanent staff, alongside job seekers seeking flexible or permanent work through a recruitment agency.
Financial Health
StrongStrong · Growing, Hiring · 48% CAGR over 4y
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Computed from 5 filingsProvides recruitment and staffing services, supplying temporary and permanent workers to sectors including hospitality, aviation catering, logistics, industrial operations, and office administration.…
Serves UK businesses needing temporary or permanent staff, including employers in hospitality, driving and logistics, industrial operations, office administration, IT, baking and event coordination.
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
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Computed from 5 filingsProvides recruitment and temporary staffing services, supplying workers for retail, catering, cleaning and general labour roles. Connects employers with candidates, manages job postings and…
Serves UK businesses needing temporary staff, particularly in retail, catering, cleaning and unskilled labour, from single hires to larger staffing needs; also engages job seekers seeking temporary…
Financial Health
HealthyHealthy · Hiring · 32% CAGR over 4y
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Computed from 4 filingsProvides recruitment and staffing services, supplying temporary, permanent, and freelance workers across sectors including healthcare, hospitality, IT, education, warehouse, events, and construction.…
Serves employers and candidates across healthcare, hospitality, IT, education, warehouse, events, construction and engineering, including councils and property managers seeking temporary or permanent…
Financial Health
StrongStrong · Growing · 1% CAGR over 3y
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Computed from 5 filingsOperates a recruitment agency supplying temporary and permanent staff to the construction and hospitality sectors. Places roles including trades and labour, scaffolders, plant operators, site…
Serves construction and hospitality employers needing staff, alongside jobseekers in trades, site management, plant operation, scaffolding, kitchens, venues, events and head-office roles.
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 4y
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Computed from 5 filingsProvides temporary employment agency services, recruiting and managing skilled professionals for short‑term roles. Handles temporary staff administration, contracts and employment procedures for…
Serves businesses of all sizes across sectors that routinely employ temporary staff, including national and international organisations needing support managing temporary employment and skilled…
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 4y
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Computed from 3 filingsProvides recruitment and staffing services, connecting employers with candidates for temporary, contract and permanent roles. Specialises in driver and transport, industrial and warehouse, and…
Serves employers needing permanent, temporary and contract staff, especially in driving, transport, industrial, warehouse and commercial roles, plus jobseekers in those fields across the South East…
Financial Health
WeakWeak · -3% CAGR over 2y
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Computed from 4 filingsSupplies temporary labour and support staff for construction and business sites, including skilled trades, general labourers, office support staff, fire marshals, traffic marshals, and housekeeping…
Serves construction main contractors, subcontractors, developers and public sector clients needing on-site trades, labour, marshals, cleaning and office support staff, from single hires to multiple…
Financial Health
HealthyHealthy · Hiring · 35% CAGR over 3y
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Computed from 3 filingsProvides recruitment and staffing services for transport and related sectors, specialising in bus and coach drivers. Also supplies rail replacement drivers, engineering staff, warehouse operatives,…
Serves UK employers needing staffing in bus and coach, rail replacement, logistics, warehousing, engineering, care, and office/admin, alongside jobseekers such as PCV bus, HGV and van drivers.
Financial Health
StrongStrong · Profitable · -32% CAGR over 2y
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Computed from 3 filingsProvides recruitment and staffing services for the logistics and warehousing sectors, supplying HGV drivers, forklift operators, warehouse staff and office support for temporary, contract and…
Serves UK logistics and warehousing employers, including large national and regional clients needing temporary, contract or permanent drivers, warehouse personnel, office support and senior logistics…
Financial Health
StableStable · Hiring · 15% CAGR over 2y
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How London Staffing companies work and how to sell to them
What they do
Staffing agencies make money by converting labour demand into billed hours, usually through a mark-up on worker pay or contractor day rates. Temporary and shift supply is cashflow-heavy: agencies fund payroll, collect approved timesheets, invoice hirers and keep the margin after statutory costs, holiday pay, insurance and administration. Contract recruitment often sits alongside temp supply, while permanent placement fees may appear as an adjunct rather than the core engine. Larger London operators may also sell account management, on-site coordination or managed-vendor services, but the basic product remains an available pool of screened workers matched to short-notice roles.
Who they sell to
Buyers are usually employers with variable staffing needs, including business hirers, public-service organisations and regulated labour users that cannot cover work only through permanent headcount. Day-to-day demand may come from site managers or operations leads, while HR, procurement, finance and payroll teams control supplier approval, rates and contract terms. Short-cover assignments can be won through direct sales and existing client relationships; larger employer accounts tend to involve preferred-supplier lists, framework-style procurement or RFPs. Contract value follows hours supplied, pay rates and worker volumes, so buyers look for fill rates, low payroll error rates and evidence that rights and onboarding checks are handled consistently.
What they buy
London staffing firms tend to spend on systems that connect candidate acquisition with compliance and payroll. Common categories include applicant tracking, recruitment CRM, worker onboarding, right-to-work checking, document management, timesheet capture, scheduling, contractor payments, payroll, invoicing and credit control. Agencies with repeat hirer relationships also buy analytics for fill rates, margin leakage and consultant productivity, plus cyber security, telephony, messaging, accounting, insurance, employment-law advice and audit support. Recruitment marketing, job advertising and reference-checking services can matter where candidate supply is tight, but finance and compliance tools usually become more urgent once assignment volumes increase.
Why and how to sell to them
Commercial intent often appears when an agency wins a new hirer account, opens another London desk, takes on more contractor payroll, changes operations or finance leadership, or prepares for a client audit. Fair Work Agency licensing exposure, Agency Workers Regulations checks and timesheet disputes can also prompt system reviews. Sellers usually get further by tying the pitch to margin protection and audit evidence rather than vague efficiency claims: fewer payroll corrections, clearer worker-status trails, quicker onboarding and cleaner hand-offs between consultants, site contacts and finance. Proof should be framed around comparable agencies with similar assignment volume and compliance burden, not generic HR technology adoption.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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Frequently asked questions
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