The Week: People news - Nesta signs up ad leaders

John Bartle, a founder of Bartle Bogle Hegarty; Moray MacLennan, the M&C Saatchi worldwide chief executive; and David Kershaw, a partner at M&C, have signed up as mentors for the National Endowment for Science, Technology and the Arts.

The creative business mentoring network, fronted by Lord David Puttnam and Sir Chris Powell, aims to provide high-growth companies from the TV production, advertising and digital media sectors with personalised mentoring from the UK's top industry executives.