I've seen Hot Katalina in N11/Finchley is £50 h/h - https://www.adultwork.com/1794674
and can fully recommend her; OWO, RO kissing (not deep, but with tongues), says anal but I've never done it with her (or requested, so cannot comment on if she does or doesn't). No fingering or rimming, but she's a nice girl, fit body, can speak good English, smells nice (fresh, showered) and tastes good too. Enjoyed seeing her, and will be back!
She's away at the mo (accessing from Hungary) - normally she puts up that she's "on holiday", which she hasn't this time, but when she's away her number isn't shown, and when she's in the UK, it's always shown, so just keep an eye on that to see when she is or isn't available.
Oana - https://www.adultwork.com/1996662
is in NW11, Golders Green, and I've also seen her. Really nice girl, little bit on the small side for my personal taste (I prefer a size 8 or 10), but she's got the most epic boobs (real) that I've been lucky enough to play with! Nice pussy, though she's an "outy" rather than an "inny" (thought I'd mention it, as some don't like it; or some prefer it!). £60 h/h, and parking is a NIGHTMARE if you intend to drive. No OWO, no fingering, and no kissing either, but she's a good fuck, a really nice girls, speaks really good English, has a nice apartment, and is very very sexy.
One I haven't seen, but got good reviews on here is Julia - https://www.adultwork.com/1883016
. Two reports of her being a really good punt, and she's cheap too at £40 h/h (and only £60 full hour!) She's in Leyton, E10 I think.
Another I can definitely recommend is Michelle - https://www.adultwork.com/1583488
. Based in Chingford, E4, she's higher in price (£70 h/h) but for me, she's just perfect; bang on size 10, super smooth, soft skin, absolutely fantastic tits, lovely little pussy (tight, smells and tastes nice). She's always impeccably turned out; very fresh and always showered, very pretty, speaks really good English, and she's a great fuck. OWO, kissing (tongues, but not deep), fingering, and sex (no anal). Only two downsides are she's a nightmare to get on the phone (persevere!) and she's just gone to doing weekdays only - no weekends. She does get a LOT of repeat business, and has a regular client base, which might be why she's hard to get on the phone. But if you do get a meeting with her, it's worth it (IMO)
This girl got a good review here https://www.adultwork.com/1932625
and is in your £50 h/h range. She's on my "to see" list too. Think she's in E6 or E7.