Since BedPan / Thameslink electrification WH PSB has sucessfully
managed to run the same railway for 15 years without routing HST to
Moorgate - or 319s to Junction Road Junction or any other
non-electrified diverging route, why would you except this happen now.

A couple of years ago a 319 failed south of Bedford, and another unit was
despatched to collect it. This second unit was routed via a non-electrified
connection between the up and down lines. The pan disengaged and brought the
wires down.

Some time before that a 319 was routed into the then new Platform 4 at
Bedford station.

So, yes, it happens all the time.

Peter Goodland.