This line goes from hither green to dartford with class 465s 707s and 376s. The route is estimated to be 24 minutes long. I have attached the photos of the trains to the file.
You could build the whole North Kent Lines network in TSW as one network Charing Cross to Dartford is less than 19 miles on any of the three routes and obviously there's a lot of shared track so with Sidcup, Bexley and Woolwich lines (and the cross between Charlton and Lewisham) you could easily have all three. Only reason NOT to is that there would be a lot of Southern trains missing between Milwall and London Bridge and Thameslink generally unless they brought in a 700 and 455
