Hello

I am not sure, but considering what I have read, Soho Joe in London seems to be a very good place. It is not expensive, but it seems to be very good. Of course, if you have lots of money the Le Gavroche with three Via Michelin stars in London could be a good place, or maybe Petrus, the Gordon Ramsay restaurant in London... I found these recommendations at
http://www.worldcityguides.net/london/restaurants/ This is of course for London, not sure though if you were interested in London restaurants..