something with SOHO with very big breasts? location and price! 
I had great luck with Tina at Newport Court. Saw her on a Tuesday and she told me she works Tues and Weds only. This was late May so hopefully her schedule is the same.
Short girl, maybe 5'0" or 5'2", enormous rack, DDDs or EEEs. Thickset in the middle, nice bum, thick muscular legs. Smiley and chatty but of course YMMV. Pretty in a girl-next-door kind of way, nothing glamorous. She says she's Brazilian but I'm not so sure about that, her accent was not what I think of as South American. I have read elsewhere that she is Bulgarian, and frankly she fits that body type better in my experience. But so what, we're all reinventing ourselves in Soho...
If you like the type as much as I do, she will scratch your itch.
If you'd like an Asian flavor, Kim at Shepherd Bush on Weds also fits the bill. She is more of an hourglass than Tina, nice boobs and bum but a slimmer waist. Pretty face, somewhat pointy, somewhat hard but still very pretty. I think her boobs might be fake but they are well done. Tina's are definitely real (and huge).
Both are worth seeing. Standard Soho charges for 20 mins.
While I'm at it, Priya at 34 Romilly is great too, big boobs, prettiest girl in Soho that I've seen (bear in mind, I've a weakness for Indians, and she is IND/POR mix). I saw her on a Tuesday also.
Hope this helps. Stay safe...