The Bombardier (Derby) built units dubbed the Aventra have been
undertaking many mileage accumulation runs in preparation for their introduction by Greater Anglia and c2c replacing a large number of units of many different classes. Having missed the southbound run a little earlier the northbound return one is seen at Cathiron. Via a contorted route the 5Q28 the 13.49 Rugby to Wolverton is being operated by 720539 and 720540. This test run would return to Wolverton in the early evening.