4997 Pre-Owned BR Mk1 57' GUV (General Utility Van) Network SouthEast '93852'Pre Owned Item, in excellent condition. Box slightly tired. A General Utility Van (GUV) is a type of rail vehicle built by British Rail primarily for transporting mail and parcels. Following nationalisation in 1948, BR had continued to build carriages to the designs of the "Big Four" companies (the Great Western, Southern, London Midland and Scottish and London and North Eastern railways), and the Mark 1 was intended to be the standard carriage design