GGrayling UK

Here's an overview of the UK's leading PR agencies based on current industry rankings, along with what makes each one stand out.

Top Full-Service / Corporate PR Agencies

Burson is currently the top-ranked agency in the UK. It was ranked 1st in the Top 150 PR Agencies in London and the UK by PRWeek in 2026, moving up from 2nd in the Top 150 PR Agencies in London and the UK by PRWeek in 2025. Burson is a global communications agency that combines strategic consultancy, creativity and technology with media intelligence tools to help organisations build and protect their reputation, and as part of WPP, works across consumer and brand communications, corporate and public affairs, creative content, intelligence and innovation.

Edelman is another agency consistently at the top. It was previously ranked 1st in the Top 150 PR Agencies in London and the UK by PRWeek 2025, and was named PR Agency of the Year at the 2026 Cannes Lions Festival of Creativity, even winning the 2026 Cannes PR Lions Grand Prix with VML for The KitKat Heist campaign. With more than 70 years of experience, Edelman is one of the world's largest communications firms, helping organisations build trust through integrated campaigns.

Brunswick rounds out the top tier — the 2026 Top 150 highlights consultancies such as Brunswick, Burson and Edelman, alongside firms leading the market across corporate communications, consumer PR, public affairs, healthcare, financial communications and crisis management.

The rankings themselves come from a respected industry source: the UK's top PR agencies are those ranked highest in the 2026 PRWeek UK Top 150, the communications industry's leading annual benchmark of agency performance, which ranks UK PR agencies primarily by annual fee income, alongside business growth, specialisms and market performance.

Other Widely-Used Agencies Worth Knowing

• Weber Shandwick UK and Grayling UK — frequently cited alongside Edelman as go-to large consultancies for media relations, reputation management, and strategic communications.
• Lansons Team Farner — a well-known independent UK consultancy often shortlisted for corporate and reputation work.
• Prohibition PR (Leeds) — a strong regional specialist agency; Prohibition won Prolific North's Best PR Agency and Best Integrated Campaign of 2019 and the CIPR's Outstanding Large Consultancy of the Year 2017 and 2019.
• Gong Communications — an award-winning international PR and communications agency and a proud B Corp, established in 2004 and headquartered in central London, offering the full spectrum of PR, marketing, digital and creative communications services.

What to Look for When Choosing (2026 Best Practice)

If you're picking an agency yourself — especially as a startup or growth-stage business — industry guidance suggests looking for: genuine sector specialism (B2B SaaS, AI, fintech, climate-tech, consumer DTC), named-journalist relationships at the FT, Sifted, TechCrunch UK and the relevant trade press, a track record of supporting capital-raises, transparent pricing aligned to founder budgets, and integrated GEO + PR capability