(2000, Glenn Close)

A red London AEC Routemaster is seen from the side on service 36, no fleetnames:

Soon afterwards a hallucinating Cruella de Ville sees a Dalmatian-spotted Routemaster passing on service 6 among other Dalmatian-spotted traffic and even people:

As can be seen from the screencap this is RM10 (VLT10):

Hugh Padden notes Routemasters RM70 (VLT70) and RM429 (WLT429); the latter also appeared in Shiner.
Screencaps provided by e kline.