I've been to a few different places around London. First one being the Tanning Salon at Liverpool Street station, which left me bruised for a week and a bit. The hair grew back incredibly quick. Then I went to somewhere near London Bridge. Again, I was unhappy as they didn't remove all the hair which was a bit pointless and it was also expensive. The best place I've been is here. No bruising, quick, not painful, and the hair took ages to grow back and also it's grown in a lot less thick than it normally does. Highly recommend this place. It's a bit hidden in a corner shop, but it's everything you need and a lot cleaner than a lot of others I've been to.