The VW class group is one of the most complex and most interesting groups of wagons that were owned by the W.A.G.R. even though (or perhaps because) no vehicles were built new as class VW. Originally VWs were "Workmen's sleeping vans" but later all bogie vans used by the civil engineering departments of the W.A.G.R. were classified VW. Wagons and coaches often entered the VW fleet with relatively little external modification from their configuration in ordinary service use - the biggest difference was in many cases a coat of white paint. However, as time went by each vehicle was progressively modified. In some cases the changes came very late in their career with some vehicles being extensively rebuilt in the late 1980s/early nineties.