Oakley Court on the bank of the Thames is a gothic mansion that became a frequent filming location for the Hammer horrors. Being just a little further east from Bray Studios on the bank of the Thames, its close proximity made it a convenient location.
Among several Hammer appearances, the main entrance became the entrance to Castle Meinster in 1960's The Brides of Dracula:
Oakley Court became a school for girls, beautifully captured in the winter of 1962-3 for Nightmare:
And it became Hamilton Manor in The Plague of the Zombies (1966):
It is still standing, and is now a hotel. Over the years it has been used as a filming location for several non-Hammer productions, most notably The Rocky Horror Picture Show in 1975.