The opening scene in The Hitchhiker’s Guide to the Galaxy television series showed Arthur Dent’s house about to be demolished for a bypass. This farmhouse was used for the exterior shots of that scene.
The house is on a farm just outside Balcombe, 11.5 kms south of Gatwick Airport.
The television series was released by the BBC in 1981, but the farmhouse still looks unchanged in 2019.
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The farmhouse is on private property and is not easy to get to. The road from Balcombe is very narrow and windy. That bypass never did get built!