 In 2002 Transdev purchased fellow London operator London Sovereign from the Blazefield Group.In April 2006 both operations were rebranded with the Transdev name and logo, removing the London United and London Sovereign brands, although both companies continued as separate legal entities.In November 2009 Transdev purchased NCP Challenger with seven Transport for London contracted routes, 87 buses and garages at Park Royal and Twickenham.