In message , Dave Arquati
writes
I have no idea... I suspect that usually a "right-rail" reverse is
preferred as firstly you don't confuse the passengers on the platform,
and secondly, sometimes you can't carry passengers over certain
crossovers. However, I know that reversals at South Harrow are
"wrong-rail".

Not always, you can go into either platform from the east.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)