I've got a question regarding these two DLCs. Why isn't it possible to combine DLCs into one route (ie: being able to do a service from London Victoria to Eastbourne)?
If talking about TSW - the key link between Lewes and Hayward's Heath isn't in either route - so those two routes combined as they are would have no real point If talking about TS (where you posted ) - there isn't an East Coastway route for this game.
