Company lists · Data refreshed September 2026

Top 25 Public relations firms based in London, United Kingdom

Name: 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 13, 2026 515 companies tracked

RevenueBase identified 515 public relations firms headquartered in London, United Kingdom as of September 2026 and tracks 4,598 professional contacts across them, including 1,831 with verified work emails and 587 with mobile numbers. London is the largest hub.

This list covers 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 13, 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 13, 2026 86% judged on-target in blind review

515Companies

4,598Contacts tracked

1,831Verified emails

587Mobile numbers

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

Ranked by team size

Top 25 of 515 public relations firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to 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	Purple	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	449 contacts →
	Indirect evidence “Purple is independent in philosophy, attitude and operation –offering a boutique in-house approach, the strategic requirements of each client are individually tailored from the…” Source: RevenueBase Database · checked Sep 13, 2026
2	Premier	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	272 contacts →
	Indirect evidence “Creative communications for entertainment, arts and culture.” Source: RevenueBase Database · checked Sep 13, 2026
3	Halpern	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	83 contacts →
	Indirect evidence “Halpern is an agency powerhouse.” Source: RevenueBase Database · checked Sep 13, 2026
4	PLMR	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
5	Ketchum UK	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	66 contacts →
	Indirect evidence “We are now Golin Ketchum London.” Source: RevenueBase Database · checked Sep 13, 2026
6	Rooster	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	43 contacts →
	Indirect evidence “Rooster is an award-winning independent PR & communications agency with a focus on innovative storytelling, performance and accountability.” Source: RevenueBase Database · checked Sep 13, 2026
7	Storm Communications	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
8	Greenbrook	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	40 contacts →
	Indirect evidence “Greenbrook is an independent strategic communications firm that advises clients on all aspects of their business through the lens of reputation.” Source: RevenueBase Database · checked Sep 13, 2026
9	Dawbell	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
10	FOX Communications	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
11	Rostrum	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	34 contacts →
	Indirect evidence “Rostrum is a leading London PR agency.” Source: RevenueBase Database · checked Sep 13, 2026
12	LOTUS	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	33 contacts →
	Indirect evidence “Part of W Communications we drive client business growth through bright and bold campaigns.” Source: RevenueBase Database · checked Sep 13, 2026
13	Lucien Pagès & Aipr	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	33 contacts →
	Indirect evidence “Global PR and Communications Agency - London” Source: RevenueBase Database · checked Sep 13, 2026
14	The PR Network	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	n/a	33 contacts →
	Indirect evidence “The PR Network (PRN) was founded in 2005 with a vision to create the world’s first remote-first PR agency.” Source: RevenueBase Database · checked Sep 13, 2026
15	L52 Communications	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	33 contacts →
	Partial evidence “L52 is a next-generation communications agency headquartered in London, with offices in New York and Mumbai, delivering a fresh, global approach to media relations.” Source: RevenueBase Database · checked Sep 13, 2026
16	The Communication Group PLC	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	33 contacts →
	Strong evidence “About The Communication Group plc The Communication Group plc is the longest established independent public relations consultancy in the UK.” Source: RevenueBase Database · checked Sep 13, 2026
17	CANOE	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	32 contacts →
	Indirect evidence “Hey there.” Source: RevenueBase Database · checked Sep 13, 2026
18	Spark Communications UK	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	31 contacts →
	Indirect evidence “At Spark, we’ve spent the last 25 years helping ambitious tech and life sciences companies craft PR campaigns, comms strategy and content that don’t just make noise, they make…” Source: RevenueBase Database · checked Sep 13, 2026
19	Liberty Comms	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	31 contacts →
	Strong evidence “Liberty Comms is an international public relations and marketing agency specialising in technology.” Source: RevenueBase Database · checked Sep 13, 2026
20	Bubble Agency	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	30 contacts →
	Indirect evidence “Founded in Bubble is a full-service PR, marketing and events agency that transforms businesses with its knowledge and network.” Source: RevenueBase Database · checked Sep 13, 2026
21	Deliberate PR	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	30 contacts →
	Indirect evidence “Deliberate makes clever Nordic, US, and European startups and concepts make the news: showcasing to potential investors, strategic partners, employees, and users just what makes…” Source: RevenueBase Database · checked Sep 13, 2026
22	Spreckley	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	28 contacts →
	Indirect evidence “Digital transformation and business continuity are at the heart of our creative, integrated and content-driven PR campaigns.” Source: RevenueBase Database · checked Sep 13, 2026
23	Carver PR	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	26 contacts →
	Indirect evidence “We’re one of the UK’s top Entertainment PR agencies.” Source: RevenueBase Database · checked Sep 13, 2026
24	Borkowski	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	26 contacts →
	Indirect evidence “We realise big ambitions, solve complex problems, build and protect reputations, and bring wild imaginations to life by unlocking the power of PR & strategic communications.” Source: RevenueBase Database · checked Sep 13, 2026
25	MD Communications	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	26 contacts →
	Indirect evidence “MD Communications is a bespoke communications consultancy dedicated to creating, building and protecting individual and corporate brand reputations.” Source: RevenueBase Database · checked Sep 13, 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: 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 public relations firms.
Partial evidence: Its own public description names part of 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 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 515 public relations firms based in London, United Kingdom

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Public relations firms based in London, United Kingdom at a glance

As of Sep 13, 2026

39.8%Verified-email coverage

12.8%Mobile-number coverage

8.9Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

372

11-50

121

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

1,4500–30

37231–60

361–90

090–180

6180+

Company record updated

Median 65.0d

00–30

1,91531–60

1,89761–90

51890–180

268180+

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 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 “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 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 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, 1,831 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 13, 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.

Public relations firms by metro in the United Kingdom

Public relations firms in London515
Public relations firms in Manchester38

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

RevenueBase identified 515 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?

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

Which city has the most public relations firms?

London leads with 515 headquartered companies, followed by Manchester (38) and Leeds (17).

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 1,831 verified decision-maker contacts tracked across these 515 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 13, 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.