David Rowe reports the use of Argos 25 (DC5878) formerly London Transport DMS142 (EGP142J), "This bus was later sold for further service to Guanzhou, China, where it became their No. 12-1288." Close inspection of the film shows it has a stunt double: Argos 22 (DC3484) formerly London Transport DMS335 (JGF335K). There has been an attempt to make the buses appear identical, however 22 carries fleet number 25 on the side and 22 on the back!
This is definitely 22:
This is definitely DMS335!
This is 22 - with fleet number 25 on the side
....and this is 25 - compare the fleet number position.....