Company lists · Data refreshed September 2026

Top 25 Internal communications consultants based in London, United Kingdom

Name: Internal communications consultants based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 632 companies tracked

RevenueBase identified 632 internal communications consultants headquartered in London, United Kingdom as of September 2026 and tracks 5,257 professional contacts across them, including 2,343 with verified work emails. London is the largest hub.

This list covers internal communications consultants headquartered in London, 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 20, 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 20, 2026 86% judged on-target in blind review

632Companies

5,257Contacts tracked

2,343Verified emails

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The 25 largest internal communications consultants based in London, United Kingdom

Ranked by team size

Top 25 of 632 internal communications consultants based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to internal communications consultants: 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	Radley Yeldar	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	198 contacts →
	Strong evidence “Radley Yeldar is an award-winning, independent London and Birmingham-based creative consultancy with more than 200 communications specialists.” Source: RevenueBase Database · checked Sep 20, 2026
2	Hanover Communications	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	177 contacts →
	Strong evidence “Hanover is an award-winning communications consultancy that advises enterprises, institutions, and individuals on rewiring their strategies for long-term success.” Source: RevenueBase Database · checked Sep 20, 2026
3	Havas People	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	170 contacts →
	Indirect evidence “At Havas People we shape meaningful brands for the changing worlds of work and study.” Source: RevenueBase Database · checked Sep 20, 2026
4	Instinctif Partners	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	130 contacts →
	Indirect evidence “Instinctif UK has officially rebranded to TEAM LEWIS.” Source: RevenueBase Database · checked Sep 20, 2026
5	Copper Consultancy	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	114 contacts →
	Partial evidence “At Copper, we combine insight, intelligence and creative communications expertise to deliver measurable impact for our clients.” Source: RevenueBase Database · checked Sep 20, 2026
6	Gallagher Employee Experience & Communication	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	10001+	113 contacts →
	Strong evidence “We are a global internal communication agency on a mission to help people feel different about work.” Source: RevenueBase Database · checked Sep 20, 2026
7	Camargue	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	111 contacts →
	Partial evidence “Camargue is an award-winning, employee-owned communications agency.” Source: RevenueBase Database · checked Sep 20, 2026
8	SOH	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	96 contacts →
	Partial evidence “We’re service communication experts – using a mix of science, creativity and service know-how to improve how you talk with your customers through all channels and media, from…” Source: RevenueBase Database · checked Sep 20, 2026
9	Cirkle	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	78 contacts →
	Indirect evidence “At Cirkle, we have 25 years' experience delivering comms.” Source: RevenueBase Database · checked Sep 20, 2026
10	Madano	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	76 contacts →
	Partial evidence “Madano is committed to building a better world through intelligent and creative communications supported by in-depth insights.” Source: RevenueBase Database · checked Sep 20, 2026
11	WA Communications	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	71 contacts →
	Strong evidence “We are a strategic communications consultancy helping organisations achieve policy and reputational outcomes.” Source: RevenueBase Database · checked Sep 20, 2026
12	The 10 Group	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	64 contacts →
	Partial evidence “We are a brand communications agency that helps businesses deepen their connections with customers, investors and industry.” Source: RevenueBase Database · checked Sep 20, 2026
13	Brunswick Creative	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	58 contacts →
	Strong evidence “We are an international, creative communications agency and we understand how business works.” Source: RevenueBase Database · checked Sep 20, 2026
14	Tavistock	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	57 contacts →
	Strong evidence “Tavistock is a leading strategic communications consultancy specialising in the corporate, financial and reputation management sectors.” Source: RevenueBase Database · checked Sep 20, 2026
15	Burson Buchanan	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	55 contacts →
	Indirect evidence “For more than four decades, we have helped our clients build, protect, and enhance their reputations, advance their business objectives, and shape the conversations that matter…” Source: RevenueBase Database · checked Sep 20, 2026
16	Prm-Global	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	54 contacts →
	Partial evidence “We are the strategic acumen of ‘Gen Plus Group’, a dynamic communications agency where strategy meets storytelling.” Source: RevenueBase Database · checked Sep 20, 2026
17	H Advisors Maitland	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	51 contacts →
	Indirect evidence “H/Advisors in the UK brings together the heritage, skills and insight of H/Advisors Maitland and H/Advisors Cicero to support leaders at their most important moments.” Source: RevenueBase Database · checked Sep 20, 2026
18	Pagefield	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	49 contacts →
	Strong evidence “Pagefield is an independent communications consultancy specialising in integrated campaigning, public affairs and corporate and brand communications.” Source: RevenueBase Database · checked Sep 20, 2026
19	Designhouse	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	49 contacts →
	Indirect evidence “Designhouse is where strategy takes shape.” Source: RevenueBase Database · checked Sep 20, 2026
20	MUSE	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	47 contacts →
	Strong evidence “MUSE is a full-service marketing and communications consultancy, with expertise in brand strategy, marketing, communication, design, public relations, digital, publishing and…” Source: RevenueBase Database · checked Sep 20, 2026
21	Ballou	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	44 contacts →
	Partial evidence “Ballou is a strategic communications partner to innovative companies.” Source: RevenueBase Database · checked Sep 20, 2026
22	JFL	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	42 contacts →
	Strong evidence “JFL is a leading communications recruitment consultancy, servicing clients and candidates from both creative and corporate communities.” Source: RevenueBase Database · checked Sep 20, 2026
23	AB	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	40 contacts →
	Indirect evidence “We help organisations reach their full potential by engaging, informing and inspiring their audiences.” Source: RevenueBase Database · checked Sep 20, 2026
24	Houston Part Of Brand Potential	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	37 contacts →
	Partial evidence “Here at Houston, we believe in the power of integrated communications to deliver real impact for our clients.” Source: RevenueBase Database · checked Sep 20, 2026
25	Apollo Strategic Communications	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	37 contacts →
	Partial evidence “Apollo is a strategic communications agency that helps elite companies, organisations, and individuals engage with their target audience.” Source: RevenueBase Database · checked Sep 20, 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: internal communications consultants. 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 internal communications consultants.
Partial evidence: Its own public description names part of internal communications consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name internal communications consultants. 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 632 internal communications consultants based in London, United Kingdom

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Internal communications consultants based in London, United Kingdom at a glance

As of Sep 20, 2026

44.6%Verified-email coverage

8.3Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

472

11-50

131

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 632 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 internal communications consultants, 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 London, United Kingdom whose own description of what they do matches “internal communications consultants”. 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 internal communications consultants), 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 internal communications consultants, and records with no verified work email. Companies headquartered outside London 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, 2,343 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 20, 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.

Internal communications consultants by metro in the United Kingdom

Internal communications consultants in London632
Internal communications consultants in Manchester35
Internal communications consultants in Bristol31

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 internal communications consultants, 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 internal communications consultants are there based in London, United Kingdom?

RevenueBase identified 632 internal communications consultants headquartered in London, 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?

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

Which city has the most internal communications consultants?

London leads with 632 headquartered companies, followed by Manchester (35) and Bristol (31).

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 2,343 verified decision-maker contacts tracked across these 632 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 20, 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.