Roganic, Marylebone, London
http://www.roganic.co.uk/Roganic/Welcome.html
Quite simply the best food I've ever had in London. Simon Rogan has to be one of the top chefs in the UK at the moment, and he's pulled off something really special here.
Forget formality, fancy tablecloths, thick carpets and so on. It's a simple enough place - certainly more like St. John than Le Gavroche. The food is very now, it's not quite at Noma levels but not far off. Ingredients that you've never heard of that are probably growing in your back garden that have been thrown together to produce amazing flavours.
Quite simply, you'll struggle to get a better meal anywhere at the moment - with the possible exception of the Fat Duck, Sat Bains or even L'Enclume itself.
Some pictures:
Seawater cured Kentish mackerel, orache, broccoli and warm elderflower honey
Heratige potatoes in onion ashes, lovage
Roasted Monkfish, chicken salt, cockles and ruby chard
Cumbrian hogget, artichokes and chenopodiums
Sweet ciceley with strawberry, buttermilk and verbena*
*I was feeling the effects of the wine at lunchtime by this point and focusing was a bit of a struggle, hence lack of sharpness..