It seems it's another branch of Thai Angels in Lancaster and Preston. As such it's unlikely to be 100% legit. Annika the owner is a bit cagey as to who she offers a hand job to so you may have to be a repeat customer with her.
There's a lot more information about Annika and the Northern branches on another North West based board but whether those details transfer to whats on offer in Birmingham is another matter.
Or closer to home search 'thaiangels' in the North West region on here
