The next suggestion in this series is the Wivelsfield branch between Wivelsfield/Keymer Junction and Lewes which would link East Coastway and London Commuter BML routes. Keymer Junction to Lewes The train route leaves the Brighton Main Line at Keymer Junction, which is just located south of Wivelsfield. Then, it heads south, passing through Burgess Hill's northern edge while it gently descends towards Plumpton. During this section of the line, the speed reaches 90 mph while still descending towards Cooksbridge. As the train slows down to 70 mph, it passes Hamsey level crossing before turning south to run along the River Ouse and entering 395 yards (361m) long Lewes Tunnel. Finally, the train reaches Lewes. Map of route. Wivelsfield station, on the BML North of Keymer Junction. Plumpton station. Cooksbridge station. Lewes station. Wivelsfield branch is out of shot in left distance. Already included in East Coastway.