68013?

When I saw Peak Rail's train on Sunday I thought that perhaps this was one of the engines that worked on the Cromford and High Peak Railway as it had the 17D shed code. When I got home I checked and found a picture with this caption.
"Robert Stephenson and Hawthorns 0-6-0ST masquerading as a class J94 and supporting the number No. 68013 (previously WD150 Royal Pioneer) arriving at Rowsley South at Peak Rail with a service from Matlock on Sunday 24th April, 2011."
Somehow I was disappointed.
Richard Lomas

David Gambles has sent me this picture of the real 68013. Thanks David. http://www.prorail.co.uk/archives/images/large/AED_E_2500.jpg

Does anyone remember when a similar engine fell off the rails near Middleton and rolled down the bankside?