Company lists · Data verified August 2026

Top 25 Advocacy consulting firms based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 198 companies tracked

There are 198 advocacy consulting firms headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 2,237 professional contacts across them, including 817 with verified work emails and 193 with mobile numbers. London is the largest hub.

This list covers advocacy consulting 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. Data current as of August 28, 2026.

198Companies

2,237Contacts tracked

817Verified emails

193Mobile numbers

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The 25 largest advocacy consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 198 advocacy consulting firms based in London, United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Portland	London	201-500	229	82
2	Instinctif Partners	London	201-500	128	35
3	Hanbury Strategy	London	51-200	121	77
4	Halpern	London	11-50	89	36
5	WA Communications	London	51-200	70	50
6	Burson Buchanan	London	11-50	54	23
7	VAE Solis Communications	London	11-50	51	33
8	H Advisors Maitland	London	51-200	50	31
9	Apollo Strategic Communications	London	11-50	37	16
10	FOX Communications	London	11-50	34	12
11	Atticus Partners	London	11-50	33	30
12	Cratus Group	London	11-50	32	23
13	Farrant Group	London	11-50	32	17
14	LOW	London	11-50	28	14
15	Lodestone Communications	London	11-50	26	5
16	College Green Group	London	11-50	23	15
17	FIELD	London	11-50	21	16
18	Whitehouse Communications	London	11-50	21	12
19	56 North	London	11-50	19	11
20	Atalanta	London	11-50	19	9
21	BB Partners	London	11-50	17	14
22	TENDO	London	11-50	16	15
23	Curzon PR	London	11-50	16	6
24	Charlesbye	London	11-50	15	11
25	Towerhouse LLP	London	11-50	14	12

Showing 25 of 198 advocacy consulting firms based in London, United Kingdom

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Advocacy consulting firms based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 198 HQs

193Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

123

11-50

51-200

201-500

501-1,000

Advocacy consulting firms by metro in the United Kingdom

Metro	Companies
Advocacy consulting firms in London	198
Advocacy consulting firms in Edinburgh	10
Advocacy consulting firms in Manchester	8
Advocacy consulting firms in Belfast	7
Advocacy consulting firms in Glasgow	5
Advocacy consulting firms in Bristol	4
Advocacy consulting firms in Nottingham	3

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “advocacy consulting firms”, with match quality audited by blind human judging, and headquartered in London, United Kingdom.
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: Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many advocacy consulting firms are there based in London, United Kingdom?

There are 198 advocacy consulting firms headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most advocacy consulting firms?

London leads with 198 headquartered companies, followed by Edinburgh (10) and Manchester (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 817 verified decision-maker contacts tracked across these 198 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.