Cor! Nice pics EL.

I thought the 'states had gone all Diesel by the mid-forties. Infact why is it double-heading with a Diesel engine?
A couple of winters ago I was on my way to a conference at a country hotel, passing what I thought was a disused railway line when this steamed past;

I nearly crashed the car!! I got ahead of it as it was chuffing along fairly slowly and took these from an overbridge for Blairgowrie. It's a Gresley A4 pacific, don't know which one, but the kind of engine that took him from Edinburgh to London when he was a kid.
Found out later it was running on the West Somerset Railway, a preserved branch line.