Why is it that even after 30 years, or thereabouts, of doing Christmas lunches I still feel panicked into writing shopping lists and lists of things to, whereas if I am doing a roast chicken sunday lunch I just bung everything in the oven with no panic, no lists and it all comes together? Oh, and I always seem to have all the ingredients in the house. Is it a conspiracy? I know I shall do it again this year. I need help!