I'm pretty sure you're right. IIRC before the Waterloo Area Re-signalling Scheme, Waterloo was controlled by a mini lever box at the throat. At some point between the abolition of that box and the commissioning of the Wimbledon ASC a temporary relay room/panel was in work. I think that's the brick building with the black sloping roof in one of the photos. Once the temporary panel was redundant I think it was used as a training school, and the outside stuff in the pictures would have been brought in to augment that facility. At some point it was the S&T depot too.Looks like a training set up to me
I don't think so. No normal sized kit fitted down there (especially not with junction indicators 1 & 4 on itRelics from the Waterloo & City Line.
Looks like it to me as well. Two things that are typical of a training facility is the placement of signals and other S&T equipment in positions that are far too close to the tracks. And incomplete point layouts (so save space/cost).Looks like a training set up to me