I have two ideas waterloo-chessington south its a full route not to long and adding the class 455 would be best choice to bring to train sim. Also another underground route such as the central line northern line victoria line and even the distract hopefully they bring these in the future.
I Don't Know about The SWR Route But Of Course, As everybody always gets whined up about, Central, Victoria and the *District Line are very unlikely Because they are ATO......... Only Underground Route Which Is Feasible Right Now Is the Piccadilly Line But They have no Plans for it As far as the community is concerned