Where Diesel got on the train is not known, but it is likely he hopped on the Stansted Express service from Tottenham Hale railway station.

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Fire crews were called to the incident at about 14:30 GMT on Wednesday after the rear diesel locomotive of the West Coast Railways train caught fire.

BBC: Salford rail delays after train derailed and caught fire

Whereas the Blue Train is pulled by no-nonsense diesel and electric engines, Rovos offers passengers a retro whiff of steam, though only for the first hour into or out of Pretoria.

FORBES: The Rail World

Compared with trucks, each train uses 100, 000 fewer gallons of diesel fuel, Pollak says.

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The prince is touring on the Royal train, which is running on bio-diesel.

BBC: Prince Charles at Ouseburn Farm in Newcastle

He is using the Royal train, which is running on bio-diesel.

BBC: Prince Charles makes Glasgow first stop on green tour