The Wycombe Railway was a British railway between Maidenhead and Oxford that connected with the Great Western Railway at both ends; there was one branch, to Aylesbury.

The Great Western and Great Central Joint Railway was a railway built and operated jointly by the Great Western Railway (GWR) and Great Central Railway (GCR) between Northolt and Ashendon Junction. It was laid out as a trunk route with gentle curves and gradients and spacious track layouts. The two companies each needed approach railways at both ends of the line to connect their respective systems; these were built as part of a single project.