RandiJM's post about the bootcamp made me look at Groupon and there's one for the Saf restaurant above Kensington Wholefoods. It's £24 for a set menu for 2 (plus a glass of wine). I've never eaten there and probably never would have but this has convinced me to try it.
http://www.groupon.co.uk/deals/london-s ... nt/9451123