I had a wonderful time there with my camera in June/July around 5/6pm walking over the bridge after getting the train from Brighton to Blackfriars, just as the golden hour was peaking, the resulting images were fantastic. Of course, part of the fun is seeing the plethora of photographers situated around the spot where your picture was taken, at that time of year, there was almost a competition for the right "spot" and an unwritten understanding that you couldn't just walk over the centre in front of everyone else to take that picture! What's it like at this time of year?