Please excuse this question if the answer seems blindingly obvious, but it isn't obvious from Australia...
When petrol/diesel was transported by rail pre and post nationalisation, was it common to have a single train of eight-ten tankers, or was fuel transported in mixed consists? I assume that 4-wheel tankers were used so I will be searching for Farish/Dapol tankers to suit, but what should pull them and how should a consist be arranged?