He filmed an episode in the house opposite me, I missed the filming but saw him wandering around afterwards. They actually used the real inside, not a studio, and he walked round the corner from his office in Wimbledon to see the old lady in her bungalow which was actually 15 miles away in Kingsbury, and in a road they called Sandybed Lane, I have a photo of the sign just before they took it off the real one.