I went to an Optimax clinic today (in Finchley Road) and had a consultation and it seems fine. I did get to see a close up video of the operation which is not good watching for the squeamish...
I did meet the surgeon, a first at all these consultations, and thought he was nice and knew what he was talking about, and had practiced this surgery for over 10 years and rarely had problems, and not with my eye prescription.
As I may go to Spain next month I may give it another month or two and think on it, as well as get money together (this company is the only one I have talked to that does not give a 100% interest free credit option).