Testing, inspection and certification firms to acquire in London

Name: Testing, inspection and certification firms to acquire in London
Creator: Firmbase
License: https://firmbase.co/terms

Updated 14 November 2026

Looking to acquire a testing, inspection or certification firm in London? Firmbase ranks 76 testing, inspection and certification firms using public company information to help buyers prioritise firms for research and potential outreach. The Approach Score ranks firms using public signals including director age and tenure, ownership, business scale, financial strength and recent changes. These firms are not listed for sale, and the ranking does not indicate that an owner is considering a sale.

The median firm has 8 staff and has been in business for 10 years. Looking beyond London? Explore the full UK list of testing, inspection and certification firms.

Firms

UK 751

25%

Every director 55+

UK 28%

25%

Held 75%+ by one person

UK 23%

Median years in business

UK 16

Median headcount

UK 10

£500k to £1m

Median turnover band

UK £500k to £1m · includes our estimates

The first 25 firms, in Approach Score order

Rank	Firm	Approach Score	The facts behind the score
1	Alvi Health & Safety Ilford, Essex	Approach Score 86/100	In post since 2016 2 individuals hold 75%+ · independent More about this firm 6 staff · turnover est. £152k Net assets £3k (Jan 2026) Director resigned Sep 2026 · PSC register changed Oct 2026 Company no. 09941860 · Companies House alvihsc.com
2	Marquistech London	Approach Score 80/100	Director aged 70 or over · in post since 2018 1 individual holds 75%+ · held via a trust or firm · independent More about this firm 12 staff · turnover est. £514k Net assets £179k (Feb 2025) Company no. 11211162 · Companies House marquistech.com
3	Amtest London, Essex A director sits on 4 or more companies	Approach Score 77/100	1 director aged 60-64, 1 aged 55-59 · longest in post since 2020 2 individuals hold 50%+ · independent More about this firm 5 staff · turnover est. £878k Net assets £618k (Dec 2024) Company no. 13102551 · Companies House amtest.uk
4	Finchley Saab London	Approach Score 77/100	Director aged 70 or over · in post since 2019 Independent More about this firm 5 staff · turnover est. £344k Net assets £13k (Jul 2025) Director resigned Jul 2026 Company no. 12080284 · Companies House
5	LPA Plus London	Approach Score 75/100	Director aged 55-59 · in post since 2016 1 individual holds 75%+ · independent More about this firm 7 staff · turnover est. £226k Net assets £159k (Apr 2025) PSC register changed Aug 2025 Company no. 10108334 · Companies House londonpropertyassessments.co.uk
6	Ascend Lift Services London	Approach Score 71/100	1 director aged 60-64, 1 aged 45-49 · longest in post since 2015 2 individuals hold 50%+ · independent More about this firm 7 staff · turnover est. £392k Net assets £181k (Oct 2025) Company no. 09828046 · Companies House ascendliftservices.co.uk
7	AID-SEL London	Approach Score 71/100	Director aged 55-59 · in post since 2004 Independent More about this firm 6 staff · turnover est. £187k Net assets £22k (Jun 2025) Company no. 05160327 · Companies House autoteks.co.uk
8	GB Fire Compliance Southgate, London	Approach Score 70/100	Director aged 60-64 · in post since 2019 1 individual holds 75%+ · independent More about this firm 5 staff · turnover est. £350k Net assets £784 (Aug 2025) Company no. 12141183 · Companies House gbfirecompliance.co.uk
9	Samotics London A director sits on 4 or more companies	Approach Score 68/100	1 director aged 60-64, 1 aged 50-54, 1 aged 45-49 · longest in post since 2024 Independent More about this firm 7 staff · turnover est. £32k Net assets £123k (Dec 2025) Director resigned Jun 2026 Company no. 15637921 · Companies House
10	Ethus London A director sits on 4 or more companies	Approach Score 67/100	1 director aged 65-69, 1 aged 55-59 · longest in post since 2017 1 individual holds 75%+ · independent More about this firm 9 staff · turnover est. £206k Director resigned Aug 2025 Company no. 11028231 · Companies House ethus.co.uk
11	AIR Surveys Wandsworth, London	Approach Score 67/100	We hold older figures than Companies House 1 director aged 65-69, 1 aged 60-64 · longest in post since 2004 1 individual holds 75%+ · independent More about this firm 5 staff · turnover est. £164k Net assets £54k (Jun 2023) · newer accounts made up to Jun 2025 Company no. 01918699 · Companies House airsurveysltd.co.uk
12	Durham Filtration Tyne & Wear	Approach Score 64/100	Director aged 65-69 · in post since 2009 Corporate owner More about this firm 11 staff · turnover est. £1.2m Net assets £103k (Dec 2024) Director resigned May 2025 Company no. 05738867 · Companies House durhamfiltration.co.uk
13	Wiss, Janney, Elstner London	Approach Score 64/100	1 director aged 70 or over, 1 aged 60-64, 1 aged 55-59 · longest in post since 2016 Corporate owner More about this firm 10 staff · turnover est. £5m Director resigned Jun 2025 Company no. 10005377 · Companies House wje.com
14	PCS Instruments London	Approach Score 63/100	1 director aged 70 or over, 2 aged 65-69, 1 aged 50-54, 1 aged 45-49 · longest in post since 2022 Corporate owner More about this firm 31 staff · turnover £11m Net assets £20.4m (Mar 2025) PSC register changed Jan 2026 Company no. 02112385 · Companies House pcs-instruments.com
15	South East Laboratories London A director sits on 4 or more companies	Approach Score 62/100	1 director aged 65-69, 1 aged 60-64, 1 aged 55-59, 1 aged 50-54 · longest in post since 2016 Independent More about this firm 7 staff · turnover est. £324k Net assets £145k (Jun 2025) Company no. 09927159 · Companies House southeastlaboratoriesltd.co.uk
16	Vehicle Testing Solutions Orpington	Approach Score 62/100	Director aged 45-49 · in post since 2009 2 individuals hold 50%+ · independent More about this firm 26 staff · turnover est. £1.5m Net assets £636k (Mar 2025) Company no. 06870270 · Companies House vtsonline.co.uk
17	ALL Counties Hvac London A director sits on 4 or more companies	Approach Score 62/100	1 director aged 60-64, 1 aged under 45 · longest in post since 2023 2 individuals hold 50%+ · independent More about this firm 18 staff · turnover est. £583k Net assets £408k (May 2026) Company no. 14638355 · Companies House allcountieshvac.co.uk
18	Kineton London A director sits on 4 or more companies	Approach Score 62/100	Director aged 70 or over · in post since 2024 Independent More about this firm 16 staff · turnover £1.2m Director resigned Nov 2024 · PSC register changed Nov 2025 Company no. 13895402 · Companies House
19	Turntabl London, Somerset	Approach Score 60/100	Director aged under 45 · in post since 2018 1 individual holds 75%+ · independent More about this firm 8 staff · turnover est. £987k Net assets £1.2m (Dec 2025) Company no. 11653705 · Companies House turntabl.io
20	Wuxi Apptec London	Approach Score 60/100	1 director aged 60-64, 2 aged 55-59, 1 aged under 45 · longest in post since 2018 Independent More about this firm 46 staff · turnover £11.7m Net assets £7.1m (Dec 2025) Company no. 07495313 · Companies House wuxiapptec.com
21	Mayfair Marine London	Approach Score 59/100	Director aged 50-54 · in post since 2018 1 individual holds 75%+ · independent More about this firm 5 staff · turnover est. £585k Net assets £412k (May 2025) Company no. 11106700 · Companies House mayfairmarine.com
22	Balance ME London	Approach Score 59/100	1 director aged 55-59, 1 aged 50-54 · longest in post since 2005 2 individuals hold 50%+ · independent More about this firm 7 staff · turnover est. £741k Net assets £261k (Apr 2025) Company no. 05417929 · Companies House
23	Lawrence Webster Forrest Kenley, Surrey	Approach Score 58/100	We hold older figures than Companies House 1 director aged 65-69, 1 aged 60-64 · longest in post since 2009 Held via a trust or firm · independent More about this firm 10 staff · turnover est. £565k Net assets -£56k · newer accounts made up to Mar 2025 Company no. 02092456 · Companies House lwf.co.uk
24	J & a Autos Croydon, Surrey A director sits on 4 or more companies	Approach Score 57/100	2 directors aged under 45 · longest in post since 2013 1 individual holds 75%+ · independent More about this firm 8 staff · turnover est. £347k Net assets £21k (Jun 2025) Company no. 08582856 · Companies House jaautos.co.uk
25	East Point GEO London A director sits on 4 or more companies	Approach Score 57/100	1 director aged 65-69, 1 aged under 45 · longest in post since 2021 Corporate owner More about this firm 19 staff · turnover est. £1m Net assets £852k (Dec 2024) Company no. 10112772 · Companies House eastpointgeo.com

51 more firms are in the list, in Approach Score order.

You're seeing the first 25. Buy all 76 for £799 + VAT, with the facts behind each score, director names, shareholders and financials.

Buy the list of all 76 firms, with director names, ages and shareholders

Each row comes with the facts behind its score, financials with dates and contact details.

What's in the file

One row per firm, in Approach Score order, as Excel + CSV.

It holds the facts behind each score, points for each part of the score, financials with dates, publicly available contact details, where identified, director names and named shareholders.

Some people with significant control appear as Other individual, with no further detail. Director email lookups are not included.

How this list is filtered

5 or more staff, from filed headcount or our estimate where none is filed.
Registered office in London.

See every filter on the UK list

How this list is built

The Approach Score ranks firms mainly on public Companies House information about owner tenure and age, ownership, size, financial strength and recent register changes.

Firms with higher scores appear first in each list.

Use the ranking to order research, then check each business directly.

Read how the Approach Score works

What it does not mean

No firm here is for sale, and the score says nothing about any owner's plans.

At least 95% of the firms where we hold directors had them checked in or after November 2026.

What we do not cover

Regulatory information is not included in this list. Buyers should check the relevant register as part of their due diligence. Check UKAS accreditation through its accredited bodies directory and read the accreditation schedule. Accreditation covers a defined scope of work, rather than every service a firm offers.

Why age bands but no people's names

Age bands come from the month and year of birth on Companies House. This page shows no exact ages and no people's names. Both come with the purchased list. The band edges from 45 to 65 are the ages where the score changes. A row shows no age bands when a director's surname is in the firm's name, its group's name or its website. Those directors' ages still count towards the score.

Is this your firm?

You can ask us to take it off every acquisition page, and out of every list we sell after that. Give us your name and work email, and we send you a link to confirm. If your email address is on the firm's own website domain, the firm comes off once you confirm. If it is not, a person reviews your request first. A list already sold stays with its buyer.

To have personal data erased, see our privacy policy.

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The standard Firmbase list

TIC Companies in the UK