I've seen this photographer a few times on Princes Street (and come across some of his photos in local exhibitions), he works very much in Bruce Gilden mode with camera in one hand and flashgun in the other, although today he had bright winter sunshine coming in from behind so not sure if he used the flash, I was too busy taking the photo to notice! It also demonstrates how close you can get to your subject without them being aware (and I suppose the same applied to me). I find it fascinating to watch other photographers at work and often try to grab a shot of them working. . . . . anyone else do this?