In 1947/48 the SAR undertook a new style of steel construction for their latest 14 brake vans. The 8300 series of vans (8300 to 8313) were built at Islington Workshops they were designed to replace older timber brake vans which were approaching their end of service life.

These vans had two goods compartments and working area for the Guard, that included a seat and desk, a stove and toilet facilities. There were also two roof mounted periscopes within the Guards section.

Originally finished in Regal Red with a black roof, this scheme was simplified to Regal Red all over. Two received white painted finish, and all the vans received AN green and yellow paint finish and recoded to AVAY.