(Reuters) - Mitchells & Butlers delivered slightly better-than-expected full-year profits on Wednesday as strong sales for both food and drinks offset rising costs, sending the restaurant and pub operator's shares to multi-year highs.The results came as the company said it had stocked up on non-perishable items and found alternatives for ingredients used in salads and garnishes to protect against any delay in supplies of fresh foods due to Brexit at its 1,700 UK restaurants and pubs.A report on..