Company lists · Data refreshed September 2026

Top 25 Investigative consulting firms based in the United Kingdom

Name: Investigative consulting firms 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 489 companies tracked

RevenueBase identified 489 investigative consulting firms headquartered in the United Kingdom as of September 2026 and tracks 7,590 professional contacts across them, including 1,664 with verified work emails. London is the largest hub.

This list covers investigative consulting firms 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

489Companies

7,590Contacts tracked

1,664Verified emails

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The 25 largest investigative consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 489 investigative consulting firms 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 investigative consulting firms: 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	HKA	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	1,129 contacts →
	Partial evidence “HKA is the leading global consultancy in risk mitigation, forensic investigations, dispute resolution, expert witness and litigation support services.” Source: RevenueBase Database · checked Sep 28, 2026
2	Gcps Consulting	Partial evidence	Sheffield, United KingdomHQ checked Sep 28, 2026	n/a	377 contacts →
	Partial evidence “GCPS is a UK-based international consulting firm with a network of highly experienced consultants supporting clients to prevent and respond to staff misconduct (e.g.” Source: RevenueBase Database · checked Sep 28, 2026
3	Forensic Risk Alliance	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	195 contacts →
	Indirect evidence “Forensic Risk Alliance (FRA) is an international consultancy that combines forensic accounting and forensic technology expertise to position businesses for success with…” Source: RevenueBase Database · checked Sep 28, 2026
4	Hawkins & Associates	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	184 contacts →
	Indirect evidence “Hawkins is a multi-disciplinary forensic practice established in 1980 with offices across the UK & Ireland, Europe, MEA and Asia.” Source: RevenueBase Database · checked Sep 28, 2026
5	Corporate Research And Investigations	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	140 contacts →
	Partial evidence “Corporate Research and Investigations Limited is a global provider of investigative research, background screening and business due diligence services for the world’s leading…” Source: RevenueBase Database · checked Sep 28, 2026
6	FACT	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	117 contacts →
	Partial evidence “FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
7	Burgoynes	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	96 contacts →
	Partial evidence “Burgoynes conduct forensic scientific and engineering investigations of fires, explosions and other major accidents, and serve as expert witnesses.” Source: RevenueBase Database · checked Sep 28, 2026
8	The Risk Advisory Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	94 contacts →
	Partial evidence “Risk Advisory Group is a global business intelligence and investigations firm.” Source: RevenueBase Database · checked Sep 28, 2026
9	Wallbrook, Part Of Anthesis	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	64 contacts →
	Partial evidence “We provide intelligence, advisory and investigative services to investors, companies and NGOs grappling with the world's most important issues.” Source: RevenueBase Database · checked Sep 28, 2026
10	Aperio Intelligence	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	58 contacts →
	Indirect evidence “Aperio Intelligence is an independent, integrity risk consultancy headquartered in the City of London.” Source: RevenueBase Database · checked Sep 28, 2026
11	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
12	Capcon Limited	Partial evidence	Epsom, United KingdomHQ checked Sep 28, 2026	51-200	39 contacts →
	Partial evidence “Founded by Ken Dulieu, Capcon initially specialised in the provision of stocktaking and investigation services, before diversifying to include the provision of security personnel…” Source: RevenueBase Database · checked Sep 28, 2026
13	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
14	Venovox	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	35 contacts →
	Indirect evidence “At VENOVOX, we are a premier consultancy in risk management and background screening, delivering specialised services in due diligence, security advisory, background checks, and…” Source: RevenueBase Database · checked Sep 28, 2026
15	C. Lewis & Company	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “We are an independent specialist international forensic accounting firm focused on providing services to clients in the insurance industry and for litigation support / dispute…” Source: RevenueBase Database · checked Sep 28, 2026
16	Raedas	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “Raedas was established by experienced investigators to provide specialist knowledge and a tailored approach in high-stakes international litigation and arbitration.” Source: RevenueBase Database · checked Sep 28, 2026
17	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
18	Forths Forensic Accountants	Indirect evidence	Leeds, United KingdomHQ checked Sep 28, 2026	11-50	26 contacts →
	Indirect evidence “Forths Forensic Accountants is one UK's leading Forensic Accountancy specialists serving the requirements of Solicitors, Insurance Companies, Private Businesses and Individuals.” Source: RevenueBase Database · checked Sep 28, 2026
19	Sastre Consulting	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	23 contacts →
	Partial evidence “Sastre is a research consultancy, a global collective of multi-lingual corporate investigations professionals and public policy analysts who specialise in modern open source…” Source: RevenueBase Database · checked Sep 28, 2026
20	Kiris Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Source: RevenueBase Database · checked Sep 28, 2026
21	Valere Capital Partners LLP	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	21 contacts →
	Partial evidence “Valere Capital Partners was founded to provide a full range of litigation consulting and expert witness services on international, high value disputes and arbitrations.” Source: RevenueBase Database · checked Sep 28, 2026
22	Martello Expert Services	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “Martello Expert Services is an independent consulting practice that provides expert witnesses in financial services, energy and commodities to the legal sector and their clients.” Source: RevenueBase Database · checked Sep 28, 2026
23	Tenintelligence	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “Our continued vision is to be the playmaker in our field; an investigation and protection consultancy, recognised for our diligence, excellence & integrity.” Source: RevenueBase Database · checked Sep 28, 2026
24	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
25	Hartford Advisers	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Hartford Advisers is a specialist intelligence, research and due diligence firm.” 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: investigative consulting firms. 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 investigative consulting firms.
Partial evidence: Its own public description names part of investigative consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name investigative consulting firms. 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 489 investigative consulting firms based in the United Kingdom

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Investigative consulting firms based in the United Kingdom at a glance

As of Sep 28, 2026

21.9%Verified-email coverage

15.5Average contacts per company

1-10Median size (employees)

40.3%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

318

11-50

114

51-200

201-500

1,001-5,000

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 489 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 investigative consulting firms, 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 “investigative consulting firms”. 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 investigative consulting firms), 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 investigative consulting firms, 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, 1,664 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.

Investigative consulting firms by metro

Investigative consulting firms in London197

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 investigative consulting firms, 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 investigative consulting firms are there based in the United Kingdom?

RevenueBase identified 489 investigative consulting firms 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?

HKA, headquartered in London, tops this list with the largest team on record.

Which city has the most investigative consulting firms?

London leads with 197 headquartered companies, followed by Manchester (11) and Norwich (8).

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 1,664 verified decision-maker contacts tracked across these 489 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.