Steak in London for a birthday dinner in London
Need to decide between Mash, STK and Hawksmoore
I've only been to Hawksmoor, but enjoyed it thoroughly.
I celebrated my birthday the year before last at Cut by Wolfgang Puck, and it was faultless -- by far the best steak I'd ever had in London (along with beautiful room and excellent service).
STK looks a bit on the cheesy side (i.e., their motto is 'not your daddy's steak house), and I suspect Mash would be dead (as it always seems to be when I go by) so not very exciting.
Nothing that wrong with Air Street, it's just a bit of a soulless behemoth of a restaurant with none of the charm of the first two branches and the feel of a sexed-up Aberdeen Angus steakhouse. The service was appreciable inferior to other Hawksmoors and the Porterhouse steak was significantly overcooked.
Also felt that Air Street, and to an extent the Guildhall, was the moment when Hawksmoor jacked up the prices to the point where it fails to be real value anymore. Overall they're still the best in town though I think.