The British Rail Class 334 is a suburban electric multiple unit built by the train maker Alstom in Birmingham. They are part of the Juniper family of trains along with Classes 458 and 460. They were built for SPT/Abellio ScotRail outer suburban services in Glasgow, UK. Their introduction saw the withdrawal of the last of Glasgow's old Class 303 "Blue Train" sets which had been in service since 1960.