Best Advertising Agencies in London (2026)

Introduction

The 13 London advertising agencies below are the network offices and ad-specialist shops doing the most visible work in 2026. Between them they cover the UK flagships of Omnicom, WPP, Publicis Groupe and Havas, plus Droga5 London from Accenture Song.

Few cities felt the 2025 and 2026 consolidation as directly. After completing its acquisition of IPG, Omnicom announced in December 2025 that adam&eveDDB would merge with TBWA\London to form adam&eve\TBWA, while FCB London and MullenLowe UK would fold into AMV BBDO. McCann London kept its name, and the DDB, FCB and MullenLowe brands are being retired during 2026. Publicis had already renamed Leo Burnett London as Leo UK at the start of 2025. WPP’s two big creative networks finished first and second at Cannes Lions 2026, with Ogilvy ahead of VML.

Every agency here has an active London office in 2026. Independents and smaller idea shops such as Mother and Wieden+Kennedy London are on our creative agencies page. The list is unranked, since the right choice depends on your brief, budget and the way you like to work.

The best advertising agencies in London

1. adam&eve\TBWA

Omnicom · City of London · adamandevetbwa.com

adam&eve\TBWA was created when Omnicom merged adam&eveDDB with TBWA\London and MullenLowe’s global business, a deal announced in December 2025. Miranda Hipwell is chief executive, Ant Nelson and Mike Sutherland are chief creative officers, and Will Grundy runs strategy. As adam&eveDDB the agency won the Grand Prix at the 2024 IPA Effectiveness Awards, and it led the shortlist for the 2026 edition.

Recent work includes “Double Act” for Twix, “Calling All Heroes” for LEGOLAND, “Missed Birthdays” for CALM and “Expedition Impossible” for Columbia Sportswear. Omnicom also moved NatWest’s creative account to the merged agency. Its listed address is 16 Old Bailey.

2. AMV BBDO

Omnicom · Marylebone · amvbbdo.com

AMV BBDO describes itself as the UK’s biggest agency by billings, a position it says it has held for 21 years. Xavier Rees has led the group since 2024, with Nick Hulley and Nadja Lossgott as chief creative officers. In Omnicom’s December 2025 restructure it absorbed FCB London and MullenLowe UK, and former FCB London chief executive Katy Wright became its chief client officer.

Clients include Guinness, Currys, Bodyform, Whiskas, Sheba, Maltesers and Tempo. Recent work runs from “Lovely day for a Guinness” in 2025 to “Pass the Pringles” for Pringles Europe and “Clampy” for the DVLA, both in February 2026. The group also runs Native, a creator-led social agency, and AMV Works for B2B clients.

3. BBH London

Publicis Groupe · Soho · bartleboglehegarty.com

Bartle Bogle Hegarty’s London office is on Kingly Street in Soho and has been part of Publicis Groupe for many years. Karen Martin is chief executive and Alex Grieve global chief creative officer, and Felipe Serradourada Guimaraes took on creative leadership for BBH UK and Ireland in May 2026. Next to the advertising practice sit BBH Studios, BBH Health and BBH B2B.

Tesco, Burger King, Audi, Monzo and Paddy Power are long-standing clients, and recent work covers Tesco Clubcard, F&F and Monzo’s “Life Beyond Financial Admin”. Barn, its eight-month incubator, offers free training and paid places to people new to the industry.

4. Saatchi & Saatchi London

Publicis Groupe · Holborn · saatchi.co.uk

Saatchi & Saatchi London works from 40 Chancery Lane as part of Publicis Groupe, under the line “Nothing is impossible”. Chief creative officer Franki Goodwin was named Campaign’s Creative Leader of the Year. In 2026 the agency moved its New Creators’ Showcase from Cannes Lions to SXSW London.

John Lewis is its best-known account, with Christmas work including “Where Love Lives”. EE (“Yes Boys”), the British Heart Foundation (“In Living Memory”, an installation of 65 red benches), Waitrose and London Sport are also on the roster.

5. Ogilvy UK

WPP · South Bank · ogilvy.com/uk

Ogilvy UK is based at Sea Containers House, where WPP has been bringing its London agencies together. James Murphy, founder of New Commercial Arts, is chief executive of Ogilvy Group UK. Ogilvy was named Creative Network of the Year at Cannes Lions 2026, and vice chairman Rory Sutherland remains one of the industry’s best-known voices on behavioural science.

Recent work includes Dulux “Life is what you paint it” with the Dulux dog, Schweppes “With time comes taste” and campaigns for Breast Cancer Now and Comic Relief. Hellmann’s, Dove, Coca-Cola, Philadelphia, Boots and British Airways also appear in its recent output.

6. VML UK

WPP · London · vml.com

VML was formed by WPP from the merger of Wunderman Thompson and VMLY&R, and its UK business is led by chief executive Joe Petyan and chief creative officer Ryan McManus. Campaign named VML its Global Network of the Year in 2026, and the network came second only to Ogilvy at Cannes Lions 2026.

The London office won the PR Grand Prix at Cannes in 2026 with Burson for “The KitKat Heist”. VML UK also lists an IPA Effectiveness award for “Waiting to Live”. The agency covers brand, customer experience, commerce, health and B2B work, with a further UK office in Manchester.

7. McCann London

Omnicom · London · mccann.com

McCann was one of three advertising networks Omnicom kept after buying IPG, alongside BBDO and TBWA. Mel Arrow is chief executive of the London office and has folded its specialist arms, McCann Enterprise, McCann Demand and McCann Content Studios, into one agency. In February 2026 she hired James Millers as executive creative director from Leo UK, where he led McDonald’s work, with Charlotte Prince and Loriley Sessions as deputies.

Mindful Chef appointed McCann London as agency of record in June 2026 after a competitive pitch, with a new brand platform due in the autumn. Reckitt brands Nurofen and Rennie are also clients.

8. Leo UK

Publicis Groupe · Holborn · leoburnett.co.uk

Leo UK took its current name at the start of 2025, when Publicis merged Leo Burnett with Publicis Worldwide. Carly Avener is chief executive, and Andrew Long was promoted to chief creative officer in July 2026. The agency calls its approach “populist creativity”, and it won seven Cannes Lions in 2025, including golds for Škoda’s “Redditor Edit” and McDonald’s “McRib Returns?”.

McDonald’s UK is the anchor client. “Camera Rolls”, built from fans’ phone screenshots, launched around the 2026 Brit Awards, and “World Menu Heist” followed in September 2026. Škoda, Confused.com, Morrisons, Premier Inn and Kellogg’s are also clients.

9. Publicis London

Publicis Groupe · London · publicislondon.co.uk

Publicis London is Publicis Groupe’s namesake creative agency in the city, and the old Publicis Poke web address now points to it. Noël Bunting is chief creative officer.

Recent work includes “The Sunroof Open” for Renault, “You Can’t Go Back” for AEG, “Asia Just Got Closer” for Cathay Pacific and “Porcelain” for Cushelle. A Foster’s spot was picked as Campaign’s Ad of the Day.

10. Havas London

Havas · King’s Cross · lon.havas.com

Havas London is the group’s main UK creative agency, working from its King’s Cross base. Holly Ripper is chief executive. Seamus Higgins joined as chief creative officer in March 2026 from AKQA London; he is best known for the Palau Pledge, which won D&AD’s Design Black Pencil of the Decade. Havas also holds a majority stake in Uncommon, which runs as a separate agency.

FrieslandCampina appointed Havas London to Yazoo in February 2026 after a pitch, and “Have a Yazoo with Yourself” launched that June. Other 2026 work covers Anchor butter around the World Cup, “Emergency Low-Gos” with Metallica for NHS Blood and Transplant, Vanish “Unbearable Blazer” and Asahi Super Dry.

11. Grey London

WPP · South Bank · grey.com

Grey London has moved into Sea Containers House as part of WPP’s consolidation of its London agencies. Jai Kotecha leads the agency and also heads social for Ogilvy Group UK, and Aaron McGurk and Helen Rhodes were appointed executive creative directors. Campaign named Grey London among seven creative agencies to watch in 2026.

Recent work includes “The island that goes beyond” for Tourism Ireland, several Vodafone Ireland campaigns, festive and awareness work for PETA, and Helly Hansen.

12. Droga5 London

Accenture Song · London · droga5.com

Droga5 London is part of Accenture Song, with sister offices in New York, Dublin, Tokyo and São Paulo. Charlotte Farrington became managing director in August 2025, and Matt Waksman was appointed head of strategy that September.

AXS hired the London office to refresh its global brand platform in January 2026. Other recent clients include Arla, Amazon Books, Rustlers, Chase and Qiddiya. Clients who also use Accenture can link brand work to wider consulting projects.

13. Lucky Generals

Omnicom (TBWA majority stake) · London · luckygenerals.com

Lucky Generals calls itself a creative company for people on a mission, with offices in London and New York. TBWA took a majority stake in 2021, and Omnicom kept it as a separate agency when it restructured its networks in December 2025. It also appears on our creative agencies list.

Clients include Yorkshire Tea, IRN-BRU (with a 2026 World Cup activation for Scotland), Beefeater, Virgin Atlantic, Amazon, EDF and Asda.

What to look for in a London advertising agency

Start with the group behind the agency. Network shops can draw on sister media, data and production businesses, though creative and media are often split across groups: Havas London handles Yazoo’s creative, for example, while Publicis Media buys the media. Ask which group resources your account would use, and what they cost.

Check who will run your business, by name. The Omnicom and IPG merger moved whole client lists between London agencies in 2026, and several creative departments were rebuilt. The people in the pitch should be the people doing the work.

Ask for evidence of effect. London has a strong effectiveness culture built around the IPA Effectiveness Awards, and most agencies here can show case studies with sales or share results. Look for work that held up over several years, since long-running platforms are where these agencies tend to earn their keep.

Finally, look at how production and approvals are handled. A single TV campaign now produces scripts, animatics, edits, social cutdowns and outdoor artwork, often spread across an agency’s in-house studio and outside production companies. Agencies with a clear review process and one place to find the latest version save clients a good deal of time.

How Fabric helps advertising agency teams

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Edits and master files live in Fabric’s cloud drive, which streams files on demand so they take no local disk space, and heavy video opens without a full download. Search works by meaning across documents, images and transcribed audio and video, so a line from a casting session or a client call can be found by what was said. Transcription adds clickable timestamps to uploaded recordings.

For review, clients can leave threaded comments through a shared link without signing up, and annotations let teams highlight and comment on scripts and PDF decks. Timestamped comments on video are coming soon. Treatments and final work can be published as a web page with password protection, and link analytics shows when each named recipient opened it. Our guide to the best creative proofing tools compares the options.

On Team plans, self-writing docs keep a page for each client up to date from meetings, Slack and the workspace, covering decisions, deliverables and open items. That helps when accounts move between agencies or teams.

Password protection and link analytics come with Pro and Team plans, and self-writing docs with Team plans, which start from $125 a month. See plans for teams.

Frequently asked questions

What is the best advertising agency in London?

It depends on the brief. On 2026 recognition, Ogilvy was Creative Network of the Year at Cannes Lions, VML London won the PR Grand Prix for “The KitKat Heist”, and adam&eve\TBWA led the IPA Effectiveness Awards shortlist. AMV BBDO says it is the UK’s biggest agency by billings.

What happened to adam&eveDDB?

After Omnicom acquired IPG, it merged adam&eveDDB with TBWA\London and MullenLowe’s global business to form adam&eve\TBWA, announced in December 2025. Miranda Hipwell leads the combined agency, and the DDB network brand is being retired during 2026.

What happened to FCB London and MullenLowe UK?

Both folded into AMV BBDO under Omnicom’s December 2025 restructure. MullenLowe’s international clients, including Unilever, moved to adam&eve\TBWA instead.

What happened to Leo Burnett London?

It became Leo UK at the start of 2025, after Publicis merged Leo Burnett with Publicis Worldwide. The agency keeps McDonald’s UK as its main client.

Where are Mother and Wieden+Kennedy London?

They are independent, so they appear on our list of the best creative agencies in London. This page focuses on network offices and ad-specialist shops.

Related lists

Advertising agencies in other cities: New York · Los Angeles · Chicago · Toronto · Sydney

More in London: Creative agencies · Marketing agencies · Branding agencies · Social media agencies · Video production · Post-production

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