This one was on last night on ITV4, I recorded it and watched it. Good, but not as good as Poppy or Stay Lucky Eh. Probably filmed in the summer of 75, nice 70s summer feel to the outdoor location shots and the sadly departed Lynda Bellingham was hot in the 70s!
A couple of motors were a Leyland Princess, driven by Jack in his undercover role at the Tescos, and I spotted a Mark 2 Escort, which would have been very new then. The Routemaster bus nicked by the Aussie villains I think was a preserved example as it had the London Transport script on the side, by 75 the ones in service would have had the white bullseye logo