Among the guests tonight is Graham Kerr , the "galloping gourmet", celebrating his return to television after 15 years (his series Graham Kerr is shown on Monday afternoons in most ITV regions). In the 70s, he was probably the best-known TV cook in the world, never without a glass in his hand ("just a quick slurp") and a double entendre on his lips. Now, after a serious car accident (ironically, involving a lorryload of vegetables), he's become a born-again Christian, and a born-again believer in healthy eating. * STEREO