Narrow gauge industrial railways had a certain charm – the trackwork would invariably be a bit “wonky”, and they used locomotives which the Americans call “critters” (a pretty fair description, I have to say). They were just another part of the railway scene 20 or 30 years ago, now they’ve all but disappeared. Here are some clay-pit railways in Yorkshire more than 20 years ago – visit “Yorkshire Mud-‘oles” on “Geoff’s Rail Dairies”