GWR Banana Vans Dapol 4F 016 131 OO Gauge Banana Van GWR Grey 95440 eBay GWR Banana Vans GWR Dia. Y4 Banana Vans from Rapido Rapido Trains RMweb. Rapido Trains UK unveils steam heated banana vans for OO gauge The origins of the Y4 date back to May 1918 when the order was given to turn 300 general purpose Dia. V16 Mink A vans into insulated meat vans, given the new diagram number X6 and re coded as Mica A. The conversion was a temporary measure and in 1922, work began to modify 258 of the X6s, this time into Y4 banana vans. Primarily working from Avonmouth docks, block trains of banana vans left for destinations like Paddington, Birmingham, Cardiff, Plymouth and Salisbury, where portions of the trains would have been divided up meaning that the vans could be seen over a large proportion of the GW network. Fitted with steam heating and a new adjustable end ventilator, these would ripen fruit in transit. The Y4s plied their trade into the BR steam era until the Avonmouth terminal closed in 1967. Our GWR Dia. Y4 vans boast an impressive spec: New doors with locks and latches moved Steam heating pipes End ventilators modelled in closed position Spoked wheels running in metal bearings NEM coupling pockets UK designed Fine detailed plastic bodies chassis with metal parts