A participatory highlight of London's Design Festival, the London Design Challenge tasks members of the design community and general public with imagining ways to make London a better place to live and visit. With transport, entertainment, street-life, environment and housing themes, ideas so far include Poke's painting London white (an homage to This Boy's Life?), as well as Tom Dixon's electric bus and Barbara Hulanicki's triangular hop-on and hop-off cars (both pictured here). Opening today, Monday 18 September 2006 at Somerset House, submissions will be accepted through tomorrow, 19 September and the show will be up until 29 September.