I've found that quite a few drivers using this junction have been driving very aggressively and at speed (well over the 20MPH limit). It seems particularly bad when children are on their way to school (or perhaps this is when it bothers me the most).
I have complained about this to Islington Council here and have suggested that a speed camera be put on Florence Street.
I don't expect that Islington Council will do anything based on my single complaint. However, if lots of other people also complain they may look into it.
Therefore, if this is something that bothers you, please do complain. My reference number is RES503631.
Thanks!