Food as eaten in California; former Wimbledon champion Stan Smith talks about the changes he's made in the food he eats; Tony Lewis investigates why the British diet contributes so much to the UK's high rate of heart disease; Delia Smith shows foods we should eat less of. Anton Mosimann , head chef of London's Dorchester Hotel, shows the healthy food for which his customers pay nearly E40 a head. Director TONY MCAVOY Producer BARRY LYNCH BBC Wales (R)