The new (2004) locomotives for Wales West were mentioned here before:
http://rypn.sunserver.com/forum/viewtopic.php?f=1&t=11408&p=52369&hilit=exmoor#p52369
I find it interesting that the locomotives appear a bit undersized for the gauge they are built. It appears it could just as well be narrowed to 18" gauge. Here is a virtually identically proportioned locomotive on the Sand Hutton railway:
The Sand Hutton Light Railway:
http://www.btinternet.com/~hoppitt/shlr/slide01.htm
Welsh engines were sometimes small like this, but it also may be a trait of the builder. A number of Exmoor 15" gauge locomotives have been narrowed to 10 1/4" gauge.
It is also of note that a significant portion of the fleet of 22 3/4" gauge quarry Hunslets were imported to the US and Canada in the 1960s. I don't know of one that operates. Can anyone inform us about the fate of the 3 engines in Terre Haute, Indiana?
http://en.wikipedia.org/wiki/Hunslet_Engine_Company
http://ronfisher.fotopic.net/c916150.html