Company lists · Data refreshed September 2026

Top 25 Investigator recruitment services based in the United Kingdom

Name: Investigator recruitment services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 187 companies tracked

RevenueBase identified 187 investigator recruitment services headquartered in the United Kingdom as of September 2026 and tracks 2,169 professional contacts across them, including 151 with verified work emails. London is the largest hub.

This list covers investigator recruitment services headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

187Companies

2,169Contacts tracked

151Verified emails

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The 25 largest investigator recruitment services based in the United Kingdom

Ranked by team size

Top 25 of 187 investigator recruitment services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to investigator recruitment services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Colvill Banks LTD	Indirect evidence	Fareham, United KingdomHQ checked Sep 28, 2026	201-500	309 contacts →
	Indirect evidence “Colvill Banks are experts in candidate research and identification.” Source: RevenueBase Database · checked Sep 28, 2026
2	Examworks Investigation Services	Partial evidence	Bolton, United KingdomHQ checked Sep 28, 2026	51-200	51 contacts →
	Partial evidence “ExamWorks Investigation Services is a leading claims investigation company providing the insurance, banking, retail and other sectors with a range of innovative and cost effective…” Source: RevenueBase Database · checked Sep 28, 2026
3	HAROD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “Harod Associates delivers global investigation and security solutions to complex crime and risk issues.” Source: RevenueBase Database · checked Sep 28, 2026
4	Apsida Life Science	Partial evidence	Surrey, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “Founded in 2019, Apsida Life Science is a specialist recruitment business Headquartered in Surrey, with offices in London UK, Boston USA and Pretoria, SA.” Source: RevenueBase Database · checked Sep 28, 2026
5	Global Perspectives, An Iqvia Business	Indirect evidence	Reading, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “Global Perspectives, an IQVIA business, specialize in engaging large numbers of hard-to-reach patients, healthcare professionals and payers to take part in scientific studies.” Source: RevenueBase Database · checked Sep 28, 2026
6	RGI	Partial evidence	Cheadle Hulme, United KingdomHQ checked Sep 28, 2026	51-200	30 contacts →
	Partial evidence “RGI Solutions - Solving the Toughest Cases with Precision and Expertise Welcome to RGI Solutions, the leading independent investigations company in the UK!” Source: RevenueBase Database · checked Sep 28, 2026
7	Diligence	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	18 contacts →
	Partial evidence “Diligence is a private investigations firm, the output of our investigations help our clients make informed decisions bridging the gap between what they know and what they need to…” Source: RevenueBase Database · checked Sep 28, 2026
8	The Sales Experts LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “At The Sales Experts, we know the best commercial professionals are rarely found through traditional recruitment methods.” Source: RevenueBase Database · checked Sep 28, 2026
9	Eurocom C.I.Ltd	Indirect evidence	Leatherhead, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Eurocom C.I.” Source: RevenueBase Database · checked Sep 28, 2026
10	Palmer Mccarthy Recruitment Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	13 contacts →
	Indirect evidence “Founded in 2014, Palmer McCarthy has quickly become the first point of call for many employers and candidates within the security and facilities management industries.” Source: RevenueBase Database · checked Sep 28, 2026
11	Keyways Security Systems Limited	Partial evidence	Altrincham, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “KEYWAYS SECURITY SYSTEMS LIMITED is a security and investigations company based in Unit 4 Lingard Court, Lingard Ln, Bredbury, Stockport SK6 2QU, United Kingdom.” Source: RevenueBase Database · checked Sep 28, 2026
12	NOVO	Indirect evidence	Leeds, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “Hiring senior leaders in specialist, regulated markets is hard.” Source: RevenueBase Database · checked Sep 28, 2026
13	Enteles Search	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “enteles Search was formed by Chris Meager and James Butler, two of the leading recruiters operating in the global security, resilience and investigative space.” Source: RevenueBase Database · checked Sep 28, 2026
14	Silverbridge	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	9 contacts →
	Partial evidence “Silverbridge is an independent investigations and intelligence firm offering a full range of information gathering services.” Source: RevenueBase Database · checked Sep 28, 2026
15	Stroud Resourcing	Indirect evidence	York, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “Fostering long-term, deep-rooted relationships, we champion healthcare organisations to improve outcomes through recruiting fully-fledged and emerging leaders who make a…” Source: RevenueBase Database · checked Sep 28, 2026
16	Pharma Partners Recruitment LTD	Partial evidence	Reading, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Pharma Partners is a specialist recruitment business focused on Medical Affairs, Regulatory, Clinical Research, Pharmacovigilance and Commercial appointments across the Life…” Source: RevenueBase Database · checked Sep 28, 2026
17	Sirs Europe	Partial evidence	Isleworth, United KingdomHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “We are a leading international investigation and discovery company with five UK offices and a network of agents worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
18	Alarmsmiths Limited	Partial evidence	St. Neots, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “ALARMSMITHS LIMITED is a security and investigations company based out of 50b Rookery Road, Wyboston, Beds MK44 3AX United Kingdom.” Source: RevenueBase Database · checked Sep 28, 2026
19	Podengo	Partial evidence	Remote, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “We are a market research participant recruitment agency with a few differences.” Source: RevenueBase Database · checked Sep 28, 2026
20	KA Services UK Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	5 contacts →
	Indirect evidence “KA Services (UK) Limited is a well-established company serving to cater to the security and other staffing requirements of various high-status organizations.” Source: RevenueBase Database · checked Sep 28, 2026
21	Panacea Patient Recruitment	Partial evidence	Altrincham, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “Panacea is a global leader in patient recruitment for clinical trials, connecting pharmaceutical companies, biotech firms, and CROs with qualified participants to accelerate…” Source: RevenueBase Database · checked Sep 28, 2026
22	Objective Focus Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Our objective is connecting you with the right healthcare professionals.” Source: RevenueBase Database · checked Sep 28, 2026
23	Bauer Security Limited	Partial evidence	East Grinstead, United KingdomHQ checked Sep 28, 2026	51-200	3 contacts →
	Partial evidence “BAUER SECURITY LIMITED is a Security and Investigations company located in FIRST FLOOR 2 CENTRAL PARADE 101 VICTORIA ROAD, HORLEY, SURREY, United Kingdom.” Source: RevenueBase Database · checked Sep 28, 2026
24	Blue Cube	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Our industry knowledge, through over 25 years at the highest level of international law enforcement and corporate investigation gives us that unique ability to support your…” Source: RevenueBase Database · checked Sep 28, 2026
25	Laser Alarms Limited	Partial evidence	Gloucester, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “LASER ALARMS LIMITED is a security and investigations company based out of Newton Ave, Gloucester, GLOUCESTERSHIRE, United Kingdom.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: investigator recruitment services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names investigator recruitment services.
Partial evidence: Its own public description names part of investigator recruitment services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name investigator recruitment services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 187 investigator recruitment services based in the United Kingdom

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Investigator recruitment services based in the United Kingdom at a glance

As of Sep 28, 2026

7.0%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

27.3%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

125

11-50

51-200

201-500

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 187 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among investigator recruitment services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “investigator recruitment services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names investigator recruitment services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among investigator recruitment services, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 151 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Investigator recruitment services by metro

Investigator recruitment services in London51

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names investigator recruitment services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many investigator recruitment services are there based in the United Kingdom?

RevenueBase identified 187 investigator recruitment services headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Colvill Banks LTD, headquartered in Fareham, tops this list with the largest team on record.

Which city has the most investigator recruitment services?

London leads with 51 headquartered companies, followed by Bristol (4) and Norwich (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 151 verified decision-maker contacts tracked across these 187 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.