I read somewhere that there is a turnback but I don't know if it is electrified. I also read the connection to the North Kent line is only suitable for engineering trains.
Yes I too believe it isn't to be used in passenger service in any form.
The turnaround is currently set at 8 minutes, or was pre Christmas, so enough time to change ends, though very tight if a change of driver, especially with the need to sanitise the cab and controls prior to setting up.
the turnback, or bolthole as it’s known, is electrified far enough to capture both pantographs, but ends shortly afterwards.
And to confirm Kevin’s question, yes the trains arrive and depart from alternate platforms at Abbeywood.
They've got 7 minutes at Hayes & Paddington at the moment, and 7 I know in other metro areas. Often there is relief, but not always. Yes its tight, but doable.