To report back.. Ended up booking the lunch in Hakkasan which just won out over the Fat Duck after much indecision on my part. everything about it was fantastic. As this was our first visit we attempted to fit in as much as possible, combing a number of dim sum, the highlight of which was an impeccable fried turnip dish (the one I had tried previously at Royal China just did not compare). We then moved on to mains which included an enormous king scallop dish and chicken in Malay sauce which was cooked to perfection with the slightly sweet / spicy sauce an excellent accompaniment. Although the mains defeated us we still found the space to share a very light white chocolate mouse. At almost £100 and bearing in mind that we only had water and tea with our meal this was definitely at the top end of acceptable but nevertheless a great “special occasion” place. One word on the service – as people reported earlier some have had some bad experiences in the past, however as far as I was concerned the people serving were extremely professional. The food all came at the right time (allowing for sufficient recovery between courses!) and given that we stayed for almost 3 hours and were about the last to leave we never felt rushed.