Whilst Head of Design at the Museum of London from 2007 – 2013, Leigh was responsible for either directly designing exhibitions or overseeing the in-house team and external designers. With over fourteen exhibitions a year, Leigh engaged many new design companies and individual designers. Leigh designed Archaeology In Action, From Moscow With Love, the interactives for Pirates: The Captain Kidd Story, the concept for Dickens and London, Miss Haversham’s Dresses.

Other 3d projects that Leigh designed include new visitor information desks, cafes, restaurants, Mudlarks Gallery and space planning at Museum of London Docklands.