In honour of Martine McCutcheon's Christmas Digital Issue, Raymond Blanc has shared his foolproof recipe for cooking the perfect Christmas ham this season. "A much-loved symbol of Christmas, glazed ham says party, celebration and indulgence," Raymond says. "On a large board, and with a sharpened carving knife beside it, the ham is an irresistible temptation. READ: Martine McCutcheon's secret to feeling better than ever - and the other Christmas film she was almost cast in "My recipe requires…