jane and i went for a walk down the (side of the) thames yesterday near Eton/Windsor-ish. From the north side of the river you pass Oakley Court Hotel and Bray Studios.
Oakley Court Castle is famous for being in various films including Saint Trinians, Dracula (the Hammer version) and the Rocky Horror Picture Show (history here). For an obsessive fan site which shows how the castle was used for the Rocky Horror Picture Show, see here
next to the Castle are Bray Studios which are famous for the Hammer Horror films. Nowadays it’s more used for telly shows and bands practising before going on big arena tours (i think)