37607 pushes the early running 3Q64 10:20 Canton Pullmans to Canton Pullmans (Via Swindon) Network Rail test train towards Kemble Tunnel on 3 January 2019. DBSO 9708 is at the front of the train. Kemble Tunnel is only 409 yards long, and as can be seen by the lack of any real hill, was only constructed to hide the line from the original Kemble estate owner's house.