I went to one place in Acton a few years ago. I enjoyed it very much, but when I did a review I got some comments about paying too much for too little.
I distinctly remember that I paid for the booking myself, and I went for my enjoyment, not anybody else's, so I ignored the comments.
Actually, I went twice, but didn't do a review for the second visit as it was the same as the first.
Sadly, they're not running/operating any more; I think that they stopped at about the same time as the Covid stuff kicked-in.
I keep hoping that they will start-up again.
From my experiences of soapy massages in Thailand I don't think that you will find anything in London or the UK which is as good/as full-on as Thailand, but I keep looking and hoping that I find something.