It may be an idea to search via AW or on a guide site and look for a girl in the area rather than a general agency.. just an idea..
As I've said, I may have a short time in my schedule to get away. So, if I have 2 hours I wouldn't want to arrange with an AW WG just to have her flake, cancel, get delayed or whatever.
I need recommendations for either walk-in parlours or agencies that have girls available on the spur of the moment so that I could, for instance, call from a particular tube station and see who was available. There seem to be several agency incalls around Baker street as an example.
"It is better to have dyspareuned then not to have pereuned at all " - Samuel Shem ' The House of God'.