Mark heads up Plimsoll’s world renowned natural history department, leading the division’s strategic and creative direction, steering its editorial vision and overseeing the department’s development group.

He joined the company in 2023 after spending more than 20 years at the BBC’s Natural History Unit, show running landmark series such as Blue Planet II and Frozen Planet II.

Since joining Plimsoll, he has pushed for genre busting, entertainment first premium natural history programmes and at an affordable price point. As executive producer, he oversaw BBC1’s Secret Garden with Sir David Attenborough which became the most popular new unscripted show of ‘26. Also for the BBC, he is working on a wildlife Christmas Special with the king of romcoms, Richard Curtis.

Mark continues Plimsoll’s close ties with Disney+/Nat Geo, with Secret’s of the Backyard in production and more to follow. Mark also oversaw Netflix’s Nightmares of Nature, a horror-nature hybrid developed with Blumhouse Television.

With environmental storytelling close to his heart, Force of Nature launched this Earth Day on ITV, the bold and gripping story of nature’s fight back against today’s extreme weather.

Mark also recently produced Horse Power, Plimsoll’s first foray into IMAX, currently playing out in giant screen theatres across North America and China.

Grant Mansfield

CEO & Founder

Jonathan Jackson

Chief Operating Officer & Chief Financial Officer

Karen Plumb

Head of Entertainment

Andrea Jackson

Creative Director, Entertainment and Talent

Alan Eyres

Chief Development Officer

James Smith

Head of Adventure & Live

Lucy Bilson

Head of Production

Dr Martha Holmes

Non-executive Director

Alex Ranken

Creative Director, Natural History, Kids & Family & Head of Immersive

Ged Mansfield

Creative Director, Kids and Family

Bill Markham

Series Producer

Seb Illis

Series Producer

Abbi Watts

Production Executive

Lucy Muldoon

Production Executive

Steph Thompson

Series Director

Nathan Small

Series Director

Becky Morrison

Head of Development

Georgina Dalby

HR Business Partner

Lucinda Lawson

Manager, Executive Office

Lilymay Rice

Talent Manager

Alex McPugh

Head of Operations
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