The three-year contract, which has an option to extend for two further years, will see DBC deliver 2.5 million cases of ambient, frozen and chilled lines and fresh fruit and veg.
"We are proud to have won this contract following a thorough tendering process, which began in June 2009," said DBC sales and marketing director Michael Barrett. "Our track record of supplying other travel sector caterers demonstrates our quality of product, service and operational excellence. The size and significance of this contract represents another major step in our development."
DBC's £20m a year contract with Rail Gourmet SSP's on-train catering arm has also been extended for a further two years.