Not directly related, but fwiw, Noble Rot Mayfair has some interesting wines btg at not crazy mark-ups. Especially considering the location. Compare the online list with the online lists of Helene Darroze and Ducasse for instance.
A few weekends ago, wandering along Jermyn Street on a Saturday morning heading for the tube home, I bumped into an old friend of this forum who just happened to have flown in for a big wine event the following day. He asked if I had any lunch plans - I didn't - and after some discussion as to where we might go, I successfully called NR Mayfair asking for a table for an early lunch.
We had some very engaging Champagne (Prevost btg) to start and choose three small pours of very diverse whites with our starters. Looking at the list and the auspicious circumstance in which we found ourselves, my friend suggested that we might enjoy a bottle of mature Bordeaux. Looking at the list we selected Palmer 1989, priced below WS. We ordered it. The bottle looked fine, and our server went to open it, but then our server said the cork had come out without any resistance. Alas when we tried it it was totally oxidised.
So on to bottle two: again looked fine, cork came out correctly, but when poured ... corked! Rather than tempt fate with a third Palmer, we opted for a different play ... LMHB 1988. But it turned out that when the bottle was sought it was 1986 wrongly listed, which we didn't really want. My friend had also been keen to try L'Evangile 1985 as he had had an excellent bottle shared last year with NM. So third time lucky? Alas no. The wine was advanced, although some might have drunk it. We said we couldn't possibly send back a third bottle in a row, so we said we would pay for the bottle, but would buy a bottle of something else to drink. The server said immediately she would speak to her manager and came back saying that they couldn't possibly charge us for something we wouldn't drink. So when in a hole ... we opted for Plan B ... William Kelley's young Chambolle Foucheres 2019 (their last bottle, which had been btg the week before, at not much more than the retail price). We drank and finished this bottle with great pleasure, and we ordered some Port afterwards.
Anyway, I felt guilty. I'd never sent three bottles back. Excellent service ... in times when La Tour d'Argent now only opens bottles at buyer's risk.