So, I visited Water Street today. I'll submit a proper review, with links, when I have more time, but basically the events of my visit will come as no surprise. I called Barbie's number and got a prompt response, booked at half an hour's notice and found the place OK - thanks to info on here. Was actually met by Kitty as "Barbie was busy". I would have been happy with Kitty - very friendly and pretty, but I questioned her on what services she delivered: CIM - Yes, Anal - No; so she went off to find her friend who would give A-Levels, and came back with Reya - quite a bit older and not so pretty, but OK and reasonable English - so I went ahead.
Excellent massage and, despite initial warning regarding size and the fact that her bum was not "professional" (nice phrase that), she took me in her arse with no trouble at all. Looking at Reya's profile after the event, she only lists massage and HR under her "enjoys" list.
Review will be Neutral because of B&S and because Reya was physically not as attractive as her younger colleagues, but I would return to Water Street if I were back in Birmingham and had time to play.