This is a video of a homemade loco 'Monster' on the FR in 2010. It was homemade by them in the 1970s. The video tells you more.
http://www.youtube.com/watch?v=RCGFqi7e8yk
As the description says
I love Monster and built my own version on a Portram chassis with a ROCO skip chassis and an RT models Lister engine and other bibs and bobs.
(https://forum.009society.com/proxy.php?request=http%3A%2F%2Fi808.photobucket.com%2Falbums%2Fzz5%2FIsleofstoner%2FIsle%2520of%2520Stoner%2520Locomotives%2Fth_DSC02616.jpg&hash=9ef7b832fd5db7b93af756b97cd2b09ff2b8ef2a) (http://s808.photobucket.com/albums/zz5/Isleofstoner/Isle%20of%20Stoner%20Locomotives/?action=view¤t=DSC02616.jpg)
On the right of this group of three tiddlers.
John W