A suggestion to the British Library
In addition to all those other restrictions (with which I agree), perhaps it might also be a good thing to remind users that the heavy use of scents, perfumes, etc., can make working in the BL very uncomfortable for one's neighbors -- especially those for whom scents can trigger migraines.
PS -- maybe the whole world would like to think about this? I love perfume, myself. I try to make sure when I wear it that a person has to get really up close and personal to smell it, though.