He was educated at the Dragon School and Eton College, where he was a Newcastle scholar and a contemporary of Tory MP Jacob Rees-Mogg.

[citation needed] During his time at Bain, Dimbleby met John Vincent, and together they formulated the idea of Leon Restaurants.

In 2013 Dimbleby and John Vincent were invited by the then Secretary of State for Education Michael Gove to write a report on school meals in the United Kingdom.

In addition, practical cooking and nutrition is now part of the National Curriculum for 4- to 14-year-olds, and two major food flagships have been launched across Lambeth and Croydon.

[14][15] On 25 November 2015, the government stated that free infant school meals would be safe from national spending cuts.

[20] In January 2024 Dimbleby founded Bramble Partners, a venture capital firm, that invests in businesses seeking to improve food security.