This is such a surreal event id deserves a mention. First, traffic. The astra with the broken brake lights is legitimately in the ASL, as it had pulled forward during the green light; it did not drive out when the light turned and so was actually being thoughtful. The car in front had pulled out on green and is now stuck in the middle of the Cheltenham Road/Ashley Road junction. Which, as it doesn't have hatched lines, is acceptable. It will, sadly, block traffic coming out of Ashley road, and hence Picton Street. Whatever has happened up the A38 is propagating through the city. Neither vehicle is blocking the pedestrian crossing; they are all crossing on the green man. Very, very unusual.
Who are the people? That is the profound thing. These people are Tourists! Walking round the area taking photos of the walls. This group are making their way from Xen's birds on nine-tree-hill, and off to snap some of the work on Ashley Road. There was an escort at the front to keep them out of trouble.
Amusingly, if they had wandered away from their escort, further east, they would have actually met one of the artists, Kai, busy decorating the boards outside a shop to flat conversion going on on Lower Cheltenham Road. But that might be a bit too dark, a bit too edgy.