Beeches beauty academy in Surrey and British Beauty Training Academy in Cheltenham. There was one other I found but was an online course so definitely decided against that.
It seems strange that it is such a hard thing to find proper training for.
I am looking as well. I have found a couple of courses but I am not sure how much I trust the level of training.
Can barely find any information on it! The treatments itself looks great though if it lasts as well as it says it does.