I saw Holly last summer for a £30 suck & fuck. She's a busty Thai MILF, looked well into her 30s to me, was friendly enough, but didn't really do it for me, a bit mechanical & bored, seemed like everything was a lot of effort and got impatient that I didn't cum quickly, but then she didn't do a lot to inspire me.
I guess if you're super-horny and looking for a quick pump & dump, she might be OK, but don't expect too much sexy encouragement.
There's definitely sexier, more enthusiastic girls, even in Soho.