https://en.wikipedia.org/wiki/C2c The London, Tilbury & Southend line would make an ideal candidate for an electric UK route. By nature the route is self-contained and within usual TSW route mileage amounts : 39 miles 40 chains (via Basildon) and yes, with the alternative via Grays and the Chafford Hundred line, but all in all within a kind of 40 mile boundary. There's the terminus at Fenchurch Street but also the optional terminus at Liverpool Street. There's a EMUD at East Ham, and a CSD at Shoeburyness for stabling operations. Passenger services on the route are almost exclusively at the current time run using the Class 357, with a small pool of Electrostar 387/3's (which may see use in tweaked form in other TSW productions). As well as the value to DTG in creating the base Electrostar model, which could be adapted for other routes in the future, the 357 'could' in theory become the base model for the class 170 DMU at some stage, assisting with man hours & creation costs. Furthermore the line sees regular class 66 haulage, so again an efficient re-use of GWE class 66's and container flats with freight services in and around Tilbury, and indeed longer haul freight services operating to the Thames Gateway port via a spur near to Stanford-Le-Hope which involves some manual points manipulation. Of course this would need the docks created and the spur, also the vast yards around the Tilbury area but everything in the C2C route is within that 40 mile boundary. I'm not perosnally sure if there are any class 08 shunters in use at freight locations but, again if suitable a cost-saving to DTG could be made using the West Somerset Class 09 ? Self-contained in it's nature and standardised rolling stock would make the LTS line a cost-effective route to create for DTG, and an enjoyable mixed passenger & freight route for the player.
This would be perfect as long as DTG doesn't skimp on the length. It should be a short enough route to fit their limits.
