Once the pride of Britain's railways, the iconic A4 Class steam engine is now rarely seen. But the locomotive has returned to the tracks and was pictured yesterday trundling along the Yarm Viaduct.

The A4 locomotive, which is the sister of the famous Mallard, has arrived in North Yorkshire for the start of the Swaledale festival. More than 1,100 people were there to see it on the Wensleydale ...