I was at Surrey Quays the other day and noticed something strange on platform 1: a 10 car stopping board on a platform and line that only ever sees 5 car trains (East London line of the overground). Is it there for historical reasons, or is there perhaps some strange routing that reverses there? Pretty sure it wasn't an SDO indicator as they are all diamond shaped AFAIK and this was a square.
Any ideas what it is/what it's for?
Any ideas what it is/what it's for?