@Dunluce - Merlin is a modified Hornby Compound (tender drive). Unfortunately she's been on display so long she no longer runs, but I plan to give her a transplant and DCC her for layout running as soon as I can.
There are some more shots of her, and more models of 85 here: http://irishrailwaymodeller.com/showthread.php/1062-Models-of-Merlin-No-85
Apprently it was a consist, and it was left stopped in place for 4 hours, but two of the locos were actualy spinning in place. Various theories including lack of 'skill' of the crew, or a kinked or damaged MU linkup
This happened on the Conn Central when they were on Amtraks Springfield line. Apparently the engineer was new and the train was stopped but he kept the throttle out. YIKES!!!