This design was created before the rebranding of GWR (First Great Western) and portrays that time of the iconic purple HST's. Maybe they haven't upgraded the whole fleet of vans yet or perhaps this design fits perfectly with the era of your model/collection. The logo is even printed on the rear chevrons as well.
(00 Gauge/ 1:76 Scale)
Transit SWB Conversion Kit- First Great Western (FGW)
To avoid unwanted reactions its recommended to store your decals in a dry, room tempature environment out of direct sunlight.