On 21 February 1804, Richard Trevithick’s steam locomotive successfully pulled a load of ten tons of iron, as well as several passengers and workmen, along a 9.75 mile route from Penydarren Ironworks in South Wales in just over 4 hours.

The construction of the railway presented numerous engineering challenges including the need to tunnel under the River Thames, but it was achieved using the ‘Greathead Shield’ which allowed workers to dig and line the tunnel simultaneously.

The robbers succeeded in stealing over £2.6 million in cash. Worth £50million today, the vast majority of the money was never recovered.