Another vote for Guys and St Thomases. No doubt biased by the fact that we were successful on our first cycle, but I found they ran to time, so no long waits for blood tests or scans and have a very simple and clear pricing structure.
Also, I'm not sure if it is still running, but I can't recommend the Bridge's MindBody course highly enough. You didn't have to be a patient at the Bridge to do it. It brought together, on a weekly basis, a group of women doing IVF and worked through various techniques (breathing exercises, yoga, mindfulness, a little bit of cognitive behavioural therapy etc) for dealing with the stress of infertility. I'm still in touch with all the girls I met through it and their support was really important to me.
http://www.bridgemind-body.co.uk/
Good Luck!