One thing with the black box pic we are working on. I initially thought that this was going to be near a pub. It appears to have 2 bottles of beer on it, (1 with a black straw) and 2 cans (1 on its side).
Doesn't strike me as an area where people would usually be drinking on the street. Possibly a red herring, but was wondering about festivals/carnivals etc that could help us with the dates. Notting Hill Carnival routes don't come anywhere near Victoria St.