The Marston Vale line (Network Rail route MD 140) is the line between Bletchley and Bedford in England, a surviving remnant of the former Varsity line between Oxford and Cambridge, most of which was closed in the late 1960s. The line is sponsored by the Marston Vale community rail partnership. The line is to be adopted and upgraded as part of East West Rail, a project underway to re-establish the Oxford–Cambridge route.