Three of us had an excellent Sunday lunch there yesterday. It's a rather undistinguished modern room, but there are views over part of Trafalgar Square from some tables and it filled up a bit by 2 ish which gave a decent atmosphere. It is of course also attached to one of the world's greatest art collections, which gave us a couple of hours real pleasure before lunch.
Pretty much a traditional Sunday lunch menu, but really well executed, and the service was spot on with just the right amount of friendliness from the staff. Mains were good roast lamb, good lemon sole, and outstanding roast beef, which is why I'm posting.
The beef was roasted rump of Dexter beef, a breed of which I wasn't really aware. Well it was just a taste revelation. Rare, but a deep purple rather than pink, and a richness of flavour which has had me on the web this morning hunting down suppliers. None in London that I can find, sadly. I recommend Hounds to seek it out.