The culinary world is in mourning today for Keith Floyd. "Keith who?," you may ask. Floyd was a legend across the pond, a true "bon viveur", and an inspiration to many of today's chefs. The TV presenter and food personality (in the true sense of the word) died of a heart attack yesterday aged 65, a couple of months after being diagnosed with colon cancer. His last TV appearance--a documentary in which he meets one of his heroes, actor Keith Allen--only aired last night. (Curiously, Floyd was