I wouldnt know about parlours or agencies. What I will say is that a Rb in advance might be good if youd like a cheap overnight. For a normal hour type session, looking locally closer to the time would be an idea I reckon. WGs move, go on holiday etc so seeing now might not be the best answer. For an overnight, area doesnt matter much for the obvious reasons. If outcalls are fine, then Id search the forum for good outcalls in London. I will have a think of who I could recommend.Do you have an example profile of looks or services you prefer?