It happened. Running ecs back from Southampton as 5Z52 to Wimbledon Park depot...
Interesting.
Maybe once the 701s are here someone may decide , whether the dft, swr, or rosco that maybe swr should keep and use the shiny, fully DOO compatible 707 trains to replace some desiros on Southampton to London shuttles or Southampton to Portsmouth trains.
But it's only suburban London where there will be doo remember, that's what the lovely first/MTR operators of swr have told everyone and that's what grayling etc said, so the dft is onboard.
....and before you know it doo is running in various forms on a wide arc radiating from London to Portsmouth and Southampton,the new suburbs of London.
Then the questioning of £40k guards starts to happen and the earlier Steer report (elsewhere in this thread or another) from about 3 years ago comes into play.
Edit: some grammatical changes