Wipe meat with damp cloth. Trim rind, notch fat at edge of slice. Brown meat on both sides in hot frying pan, lower heat and cook 10 min. Remove ham to warm plate. Pour off all but 2 Tablespoons of fat from pan. Blend in flour, mustard and sugar. Add milk, cream or evaporated milk and worcestershire. Return ham to pan and spoon sauce over. Cover and simmer 15 min. Serve with sauce spooned over.