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Historians Ruth Goodman, Peter Ginn and Alex Langlands continue their exploration of the golden age of steam by revealing how branch lines turned local cottage businesses into national industries.

Dairy farms in Devon, wool manufacturers in Wales and whisky distilleries in the Scottish highlands were able to transport their products around the country via the rail network.

As Ruth discovers how this also caused a rise in the use of working horses from expert Ian Cryer, Peter finds out about the life of a steam engine driver.

Unsurprisingly, it wasn’t an easy one, as it involved the laborious job of cleaning out the locomotive’s firebox, which took three and a half hours, before the train could go anywhere.