My suggestion is that DTG should make it so the shutters on depot type buildings are up and you can drive in. This is seen on: ECML @ Doncaster Carr IEP Glossop @ Ardwick (??) TMD SEHS @ Ashford Depot & Gillingham Depot At Wembley Intercity Depot for example, they seem to be closed. Unsure if any are a maintenance facility, but it could make for some cool 390 shunts.
Maybe - I don't have Cathcart but just listed a few routes I have and know open depots are functional on.
