He introduced the first streamlined rail cars in 1934 and by 1942 38 had been built , although the latter ones had more angular styling .
It was under Collett 's control that diesel power first appeared on the GWR .
Collett introduced the first streamlined rail cars in 1934 and by 1942 38 had been built , although the latter ones had more angular styling .
It was under Collett 's control that diesel power first appeared on the GWR .