Where was the old red station building; was it where the bus station is now,
next to the old Central London Railway power station?

What is the smaller part of the power station which is not used by buses
used for now? There seems to be some sort of equipment in there; is it a
substation for the Underground?

Other than filming some of 'Who framed Roger Rabbit', what was the power
station building used for after it ceased to be a power station?