Leader in Public Affairs: Zara Harrington, Head of Public Affairs, Diageo – “Luck is when preparation meets opportunity”

Mace | 3rd August 2026 | In-House Public Affairs, Westminster Index
Zara Harrington

From navigating regulation and trade policy to aligning advocacy with commercial strategy, Diageo’s Zara Harington's career in public affairs has been about understanding how political decisions translate into real-world business outcomes.

“The direct link to a business’ operations and its commercial priorities” is what makes public affairs compelling for Zara Harington. As Head of Public Affairs at Diageo, she works at the point where government policy, regulation and commercial strategy meet — and where decisions made in Westminster and beyond can have immediate implications for a global consumer business.

That connection, she says, is what distinguishes in-house public affairs from other roles in the industry. “You can see first-hand the impact public affairs and government relations has — and that’s exciting.” In a company like Diageo, where regulation, taxation and trade policy are constant factors shaping the operating environment, the feedback loop between policy decisions and business outcomes is unusually visible.

Working in a global consumer goods company also means navigating a policy landscape that is both highly regulated and highly scrutinised. Issues ranging from alcohol duty and advertising standards to international trade, supply chains and sustainability all require careful engagement with policymakers. For public affairs teams, that means balancing multiple priorities: protecting the business, contributing to policy development and ensuring that regulation is workable in practice.

Harington’s focus on the “direct link” between policy and operations reflects a broader shift in the profession. …

Subscribe to The Mace

Join the member community shaping British politics and stay ahead of what's really happening in the world of politics and public affairs, with expert analysis, breaking news, and insider insights from Westminster and Brussels. The Mace is the leading news source and resource for the government affairs industry, offering required reading and lobby intelligence for professionals.

To see what you are missing out on by not subscribing to The Mace, click here to download our full membership info-pack. This includes having no paywall on op-ed content or profiles/interviews, allowing professional profiles to be read with maximum impact and visibility by government, special advisers, MPs, peers, civil servants, and policy and political decision-makers.



Industry Watch: John Gill, Deputy Director of External Affairs, Reform UK – “There’s no limit to where a man can go if he doesn’t mind who gets the credit”

Mace Magazine | August 20, 2026

John Gill's promotion at Reform UK, just before the party launches its inaugural Business Day at its September NEC conference, is indicative of how the party is ramping

The Mace Questionnaire: Marshall Manson, CEO, FleishmanHillard UK – “Politics is seeping into business through every crack” 

Mace Magazine | August 12, 2026

The innovative digital comms veteran Marshall Manson, now CEO of FleishmanHillard UK, reveals how he misses The West Wing, was introduced to Westminster by Gyles Brandeth's political diaries

The Strategist: Michael Prescott, Managing Director, Hanover – “Better to risk being the most overdressed person in the room than the scruffiest” 

Mace | August 11, 2026

From political editor of The Sunday Times to bringing down two BBC chiefs, Michael Prescott reflects on his distinguished career as a journalist and now leading UK corporate

Leader in UK Public Affairs: Martin Turner, Director of Policy and External Affairs, BioIndustry Association, “Pensions reform is a major issue for us”

Mace | August 8, 2026

Turner’s work sits within the BioIndustry Association, the trade body representing the UK’s biotechnology and life sciences sector.

Leader in UK Public Affairs: Konrad Shek, Public Policy & Regulation Director, Advertising Association, “I prefer strategy to performance, substance to theatre”

Mace | August 7, 2026

Konrad Shek discusses his proudest achievement of building the Advertising Association’s credibility and influence in media literacy policy.

Leader in UK Public Affairs: Robert Forrester, Chief Executive, Vertu Motors plc, “Leaders need to cast a vision and hold people accountable”

Mace | August 6, 2026

Robert Forrester reflects on his achievement in helping to found a company 20 years ago that now generates £5bn in revenue and employs more than 7,500 people.

Leader in Public Affairs: David Sheen, Public Affairs Director, UKHospitality, “Take a risk, offer innovative solutions”

Mace | August 5, 2026

David Sheen pushes back against common perceptions about public affairs, but argues instead that it is about hard work, marshalling arguments, and building coalitions.

Leader in Public Affairs: Signe Norberg, Director of Policy and Public Affairs, ISEP, “Human relationships remain critical, AI needs careful application”

Mace | August 4, 2026

Signe Norberg reflects on her leadership philosophies, encouraging people to 'lead with humanity'

Leader in Public Affairs: Grace Pritchard, Downing Street Director of News and the Prime Minister’s Political Spokesperson

Mace | August 3, 2026

After heading the Makerfield by-election comms team, Grace Pritchard was singled out by Andy Burnham as being a key part of his northern campaign team. The self-styled 'Yorkshire

Leader in Public Affairs: Zak Viney, Campaigns and Public Affairs Coordinator, Living Streets, “Politics starts locally on the doorstep”

Mace | August 3, 2026

Living Streets’ Zak Viney speaks to The Mace about moving from engineering into advocacy, making the case for walkable streets across political divides and securing practical progress on