I think the complaint really is that home-grown British cuisine--you know, Lancashire hot pots, Cornish pasties, breaded plaice, etc.-- isn't so good.

Actually, if you get the right people to make these for you, these dishes can be amazingly good. But done poorly (as you'll often find them), it's pretty stodgy stuff.

London's international cuisine, on the other hand, is second to none--New York, Paris, and Tokyo included. Check the Red Book and you'll find London has plenty of quality establishments, and a number of extraordinary ones to boot.
_________________________
Self-deception facilitates harm to others and to oneself, undermines autonomy, corrupts conscience, violates authenticity, and manifests a vicious lack of courage and self-control that undermines the capacity for compassionate action.