Company lists · Data refreshed September 2026

Top 25 Investigator recruitment firms based in the United Kingdom

RevenueBase identified 237 company matches for investigator recruitment firms associated with the United Kingdom as of September 2026 and tracks 2,497 professional contacts across them, including 207 with verified work emails. London is the largest hub.

This list covers company matches for investigator recruitment firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
237Companies
2,497Contacts tracked
207Verified emails
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The 25 largest investigator recruitment firms based in the United Kingdom

Ranked by team size
Top 25 of 237 company matches for investigator recruitment firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFareham, United KingdomHQ recorded Sep 28, 2026201-500309 contacts →

Exact match

“Colvill Banks are experts in candidate research and identification.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchBolton, United KingdomHQ recorded Sep 28, 202651-20051 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5036 contacts →

Exact match

“Harod Associates delivers global investigation and security solutions to complex crime and risk issues.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchCheadle Hulme, United KingdomHQ recorded Sep 28, 202651-20030 contacts →

Exact match

“RGI Solutions - Solving the Toughest Cases with Precision and Expertise Welcome to RGI Solutions, the leading independent investigations company in the UK!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20029 contacts →

Exact match

“Adaptive Business Group serves an international client base via recruitment and M&A advisory teams across our offices in London, New York, San Diego, Singapore and Berlin.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-1021 contacts →

Exact match

“Resource Professionals are a firm of search consultants specialising in the recruitment to recruitment market.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5020 contacts →

Exact match

“Adamson & Partners is a leading global Executive Search firm specialising in Intellectual Property (IP), Legal appointments and M&A transactions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5018 contacts →

Exact match

“Illapa Search is a Legal Executive Search firm, specialising in North America.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20018 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5018 contacts →

Exact match

“At The Sales Experts, we know the best commercial professionals are rarely found through traditional recruitment methods.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchGlasgow, United KingdomHQ recorded Sep 28, 202611-5016 contacts →

Exact match

“We provide elite executive recruitment & headhunting solutions for the Biotech, Biopharma, Life Sciences and related industries.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchLeatherhead, United KingdomHQ recorded Sep 28, 202611-5015 contacts →

Exact match

“Eurocom C.I.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-1013 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“Founded almost a decade ago, Laz Partners is a specialist executive search and talent advisory firm focused exclusively on front-office investment talent across global macro…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchAltrincham, United KingdomHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“KEYWAYS SECURITY SYSTEMS LIMITED is a security and investigations company based in Unit 4 Lingard Court, Lingard Ln, Bredbury, Stockport SK6 2QU, United Kingdom.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchLeeds, United KingdomHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“Hiring senior leaders in specialist, regulated markets is hard.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-1010 contacts →

Exact match

“enteles Search was formed by Chris Meager and James Butler, two of the leading recruiters operating in the global security, resilience and investigative space.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-109 contacts →

Exact match

“Silverbridge is an independent investigations and intelligence firm offering a full range of information gathering services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-508 contacts →

Exact match

“Established in 1992, Spalding Goobey Associates specialises in the recruitment of market research and Insights professionals at all levels, from graduate trainee to managing…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-107 contacts →

Exact match

“Life Science Medics is a leading boutique firm focused on the recruitment of experienced physicians in the Life Science industry.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchReading, United KingdomHQ recorded Sep 28, 20261-107 contacts →

Exact match

“Pharma Partners is a specialist recruitment business focused on Medical Affairs, Regulatory, Clinical Research, Pharmacovigilance and Commercial appointments across the Life…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchIsleworth, United KingdomHQ recorded Sep 28, 202611-507 contacts →

Exact match

“We are a leading international investigation and discovery company with five UK offices and a network of agents worldwide.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchSt. Neots, United KingdomHQ recorded Sep 28, 20261-105 contacts →

Exact match

“ALARMSMITHS LIMITED is a security and investigations company based out of 50b Rookery Road, Wyboston, Beds MK44 3AX United Kingdom.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchLiverpool, United KingdomHQ recorded Sep 28, 202611-505 contacts →

Exact match

“Founded in Go3 Partners Executive Search have been responsible for some of the most high profile moves in UK recruitment history.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-2005 contacts →

Exact match

“KA Services (UK) Limited is a well-established company serving to cater to the security and other staffing requirements of various high-status organizations.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 237 investigator recruitment firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 207 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Investigator recruitment firms based in the United Kingdom at a glance

As of Sep 28, 2026
8.3%Verified-email coverage
10.5Average contacts per company
1-10Median size (employees)
35.9%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
162
11-50
48
51-200
22
201-500
2
10001+
1

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 237 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “investigator recruitment firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 207 professional contacts with verified work emails across the full matched dataset. 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.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Investigator recruitment firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “investigator recruitment firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 237 company matches for investigator recruitment firms associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Colvill Banks LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most investigator recruitment firms?

London leads with 85 company records, followed by Bristol (4) and Liverpool (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 207 professional contacts with verified work emails tracked across these 237 companies; direct dials are available where recorded.

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.

Ready to reach these companies? Verified emails and direct dials for all 237 investigator recruitment firms based in the United Kingdom. Start with a free account, no credit card.

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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 SmartSearch, 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.