Hi Mairi,
The reason I suggested yourself is because I know what is available in London pretty well, having gone through all this myself a few years previously. And also drawing on the experiences of other London based HairTell users who I have communicated with.
Clearance will take on the longer side 10 hours + and it will not be possible in one or even two sessions. I also feel that (with the exception of Follizap) no one is equipped to well see light coloured hairs.
As you say, the most important thing is proper treatment of the hairs. Many_Q’s was interested in the Parkside ladies but their regrowth is on the higher side, meaning that many treated hairs are not being killed. After stopping laser on my underarms, I waited a year to begin electrolysis for what was left. It became frustrating because I had many clearances and still hair kept reappearing (it did get less but upto a point which we couldn’t seem to get over). Finally, when I saw Josefa last year, she cleared each (took 10-15 mins each) and what has grown back could now be cleared in 1-2mins. That was 8 months ago, I don’t even shave now, just occasionally trim. In my sister’s diary, I also discuss the eyebrow work she had there.
Personally, as people may have guessed, I would rather travel and spend a few days with someone I can know remove all or most of the hair and can give a good indication of how many clearances might be required. When it’s a small area, like the upper lip, somewhere like Parkside is fine in my opinion. But when you are working on the body, or something like my peach fuzz, which takes many hours of work to treat every present hair even once, then you would be wasting a huge amount of money if 50% or more was to grow back.
Still - You can read Geeza’s thread to see Follizap’s work in action.