Off to London in a couple of weeks and have been scouring the web looking for a nice Japanese restaurant to take my husband to for lunch. Ideally I'd like to find somewhere with great food and a nice atmosphere, but can't seem to find anything in between the cheap eats / noodle bar / wagamama / yo sushi kind of place and restaurants like Nobu / Zuma / Roka where the bill is likely to come to £130 per head. My budget is more like £50-60 per head. It would need to be in central London (ie. Mayfair / St James's / Soho / Knightsbridge / Kensington). If anyone has any suggestions I'd be incredibly grateful.