Went to investigate this depot today that I mentioned a few weeks ago. It is actually a Torrent depot now and there were four fastclippers present including refurbished 909318 which is ex BB XRP8153. This old number is still visible on rear frame.
This is the small yard almost adjacent to platform 2 at west end of station.
It is possible to view via the new walkway between the station platforms (gated) and the Waterloo Road entrance.