Police Story 2 (1988, Jackie Chan)

Several Hong Kong types are seen, such as a three axle MCW Metrobus and a Leyland Victory II:
Numerous Mitsubishi Fuso minibuses appear in closeup;
As in the original 'Police Story', we see two ex-London Transport DMS Daimler Fleetlines, both MCW-bodied, one in a traffic queue; the registration, seen in close up, is possibly CT1776 - can anyone identify its London Transport number:
The second, with fleetname 'Fountain'(?) is part of an elaborate stunt involving Chan on the roof - registration is unclear, but may be CX8503 or CX8507: