Berwick Upon Tweed
This one needs plenty of space, but would be well suited to running around the walls of a spare room - the simple track plan means that this space could be extended, or even compressed, fairly easily. The top right corner is devoted to a long viaduct, with the island station in the top left. The rest of the running lines could also incorporate a loco depot, freight sidings, or the fiddle yard as shown bottom left. A split-level baseboard, with track only running on the top level, leaves plenty of room for scenic development.