Company lists · Data refreshed September 2026

Top 25 League public relations firms based in London, United Kingdom

Name: League public relations firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 182 companies tracked

RevenueBase identified 182 league public relations firms headquartered in London, United Kingdom as of September 2026 and tracks 1,255 professional contacts across them, including 532 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers league public relations firms 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 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

182Companies

1,255Contacts tracked

532Verified emails

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The 25 largest league public relations firms based in London, United Kingdom

Ranked by team size

Top 25 of 182 league public relations firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to league public relations 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	PLMR	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	78 contacts →
	Partial evidence “PLMR delivers Communications with Impact Lobbying and Public Affairs We draw on the experience of former MPs, candidates and advisers, local authority councillors and public…” Source: RevenueBase Database · checked Sep 28, 2026
2	Square In The AIR	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	56 contacts →
	Indirect evidence “Square in the Air is an award-winning communications agency for the sports, betting & gaming and financial industries, providing a range of PR, marketing and content services to…” Source: RevenueBase Database · checked Sep 28, 2026
3	Burson Buchanan	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
4	Prm-Global	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	54 contacts →
	Indirect evidence “We are the strategic acumen of ‘Gen Plus Group’, a dynamic communications agency where strategy meets storytelling.” Source: RevenueBase Database · checked Sep 28, 2026
5	Mongoose	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	43 contacts →
	Indirect evidence “We’re a leading integrated sports & entertainment marketing agency, delivering specialist expertise in Sponsorship, PR, Digital and Events.” Source: RevenueBase Database · checked Sep 28, 2026
6	Mercieca	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	41 contacts →
	Indirect evidence “We’re Mercieca.” Source: RevenueBase Database · checked Sep 28, 2026
7	Storm Communications	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	41 contacts →
	Indirect evidence “Drop us a line at hello@stormcom.co.uk to sign up to our Consumer Brands or Corporate newsletter** Storm is a hardworking, down-to-earth, friendly and results-driven agency.” Source: RevenueBase Database · checked Sep 28, 2026
8	Dawbell	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	37 contacts →
	Indirect evidence “DawBell sits at the centre of the UK entertainment industry, providing integrated communications services for some of the biggest music acts, elite athletes, top-tier talent and…” Source: RevenueBase Database · checked Sep 28, 2026
9	FOX Communications	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	35 contacts →
	Indirect evidence “At Fox Communications, our best practice merges solid thinking with an adaptability that reflects an ever-changing digital landscape.” Source: RevenueBase Database · checked Sep 28, 2026
10	Cardew Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Indirect evidence “For more than three decades the team at Cardew has worked with major companies and business leaders to communicate effectively with the media, the international financial…” Source: RevenueBase Database · checked Sep 28, 2026
11	Matchfit	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “We are the communications agency that speaks the language of sport.” Source: RevenueBase Database · checked Sep 28, 2026
12	The Outside Organisation	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Strong evidence “We are The Outside Organisation, the UK’s finest Public Relations agency.” Source: RevenueBase Database · checked Sep 28, 2026
13	Seven Consultancy	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “We are a team of experts who are passionate about the brands and organisations we work with.” Source: RevenueBase Database · checked Sep 28, 2026
14	Flame PR	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Strong evidence “As a leading public relations agency specialising in a number of key sectors, Flame PR has an established track record of delivering results through an impressive list of contacts…” Source: RevenueBase Database · checked Sep 28, 2026
15	Soapbox	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “An award-winning PR agency providing communications, content and partnership solutions to some of the biggest talent, brands and rights holders in sport.” Source: RevenueBase Database · checked Sep 28, 2026
16	Chelgate Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Headquartered between Tower Bridge and London Bridge in the heart of London, Chelgate has branch offices in Brussels (for EU Affairs) and Bucharest (for eastern Europe), together…” Source: RevenueBase Database · checked Sep 28, 2026
17	Earnies	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “We're passionate about the power of earned, and champion the art of media relations in all that we do.” Source: RevenueBase Database · checked Sep 28, 2026
18	Woburn Partners	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “Woburn Partners is a full-service communications agency.” Source: RevenueBase Database · checked Sep 28, 2026
19	Full Circle Communications	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “Full Circle brings together a team of skilled insurance PR and communications experts with one clear aim: to enhance and increase the impact of your communication activities on…” Source: RevenueBase Database · checked Sep 28, 2026
20	Samphire Communications	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “Zoe Wilmer founded Samphire in May 2010.” Source: RevenueBase Database · checked Sep 28, 2026
21	HOUND	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “We love a challenge, the bigger, the better.” Source: RevenueBase Database · checked Sep 28, 2026
22	Aspire	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Aspire is a London-based PR and communications agency specialising in sport, the outdoors, fitness and wellbeing.” Source: RevenueBase Database · checked Sep 28, 2026
23	Blytheray	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Strong evidence “We are a boutique public relations and strategic communications agency.” Source: RevenueBase Database · checked Sep 28, 2026
24	Black Letter Communications	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “At Black Letter Communications we understand the law and the media in equal measure.” Source: RevenueBase Database · checked Sep 28, 2026
25	Mattison Public Relations	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Strong evidence “Mattison Public Relations is a market-leading public relations consultancy.” 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: league public relations 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 league public relations firms.
Partial evidence: Its own public description names part of league public relations firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name league public relations 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 182 league public relations firms based in London, United Kingdom

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League public relations firms based in London, United Kingdom at a glance

As of Sep 28, 2026

42.4%Verified-email coverage

6.9Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

124

11-50

51-200

201-500

501-1,000

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 182 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 league public relations 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 London, United Kingdom whose own description of what they do matches “league public relations 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 league public relations 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 league public relations firms, 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, 532 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.

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 league public relations 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 league public relations firms are there based in London, United Kingdom?

RevenueBase identified 182 league public relations firms 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?

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

Which city in the United Kingdom has the most league public relations firms?

London leads the United Kingdom with 182 headquartered companies, followed by Manchester (11) and Glasgow (7).

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 532 verified decision-maker contacts tracked across these 182 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.