The Signals Lab
Jem Lloyd-Williams is President of Mindshare and CSO of WPP Media. Thirty-five years across TV sales, digital content and media agencies. Now running one of the UK’s best-known agency brands and the strategic spine of WPP Media, through the age of agentic AI.
“We used to keep pace with the complexity. Now we’re outrunning it.”
Jem Lloyd-Williams has spent thirty-five years at the intersection of media, strategy and innovation inside the UK’s largest agency brands. In November 2025 he took on the dual role of President of Mindshare and Chief Strategy Officer of WPP Media, the group that sits at the core of WPP’s client offering. His thesis on the current AI moment: what is genuinely different is the universality of AI’s application, and the bottleneck is no longer the answer but the problem statement.
Lloyd-Williams started in TV sales in 1990 at Thames Television, then UK Gold for six years, then as station manager at Channel 5 Television until the end of 1999. At the turn of the century he crossed from broadcaster side to agency side, spending nearly eight years as a shareholding director of Sticky Content, the UK digital editorial content agency. From there he joined MediaCom in 2008 as a digital strategist in Media.Com, and rose through Content Director, Director of MediaCom Beyond Advertising and Managing Partner Strategy roles across five years.
In 2014 he moved to Vizeum UK as Executive Director of Product and Innovation, becoming CEO in 2016 and leading the agency for three and a half years. In September 2019 he took on the CEO role at Mindshare, running the UK’s largest media agency through six years of continuous transformation, including the COVID period and WPP’s media-group restructure into what is now WPP Media. In November 2025 he added the Chief Strategy Officer role for WPP Media to the Mindshare presidency.
Alongside the day job, he has been a Street Leader at Street Wisdom since 2013, a movement built on the idea that creative problem-solving capacity can be unlocked by walking and observing the street. The two commitments rhyme: a careful attention to signals in the everyday, whether in urban space or a 33,000-brand equity database, and a view of the marketer’s role as problem definer first and answer finder second.
“Can I still sit with my mates?”
“If you’ve got an hour to save the world, spend fifty minutes on the problem.”
Lloyd-Williams returns repeatedly to the idea that the bottleneck in media strategy is the problem statement, not the answer. Media specialists’ primary job is to understand the client’s problem more deeply than anyone else in the room. The acceleration of agentic AI across data and analytics has made better recommendations cheaper and faster to generate, which makes the craft of problem definition more valuable, not less.
“Everybody in the business has to see AI as an enabler rather than a weird replacement.”
Mindshare has spent two and a half to three years making AI safely and widely accessible to every team member, including the ability to build their own agents for internal workflows. Only with that foundation in place has the agency moved to enterprise-scale agentification of core tools. The Brand Asset Valuator, with its 33,000-brand dataset, now answers strategic questions in hours rather than weeks, with a human in the loop to validate and augment.
“Mindset or passion is a more useful guide than demographics to where a brand needs to show up.”
Lloyd-Williams argues the old media-planning instinct of leading with demographics is incomplete for a culture-first era. Brand growth now comes from being pulled into consumer communities on the community’s terms, rather than being pushed at consumers from outside. His reference case is the community-first work Mindshare does with Unilever. AI’s role in decoding the language, codes and passions of those communities is significant, but the final act of turning information into knowledge stays a human craft.
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