(BBC crime series, 2003-)

Chris Hough reports “The episode broadcast on 7 May 2007 featured a London Transport Leyland RTL at Battersea Power Station as the retired detectives investigated a fifty year old murder. There was a broadside exterior view and shots of the platform and upper deck interior”

Colin Read adds “I would put money on it having been RTL139. Cobham Bus Museum have been doing some filming for New Tricks and since the RTL resides there, q.e.d.” The 'Typhoo' advert clinches it for me!