It was posted recently on the Miniature Railway Forum that there was a prototype locomotive proposed by Henry Greenly for heavy freight work on the R&ER. Naturally being interested in all things 15" I set about obtaining diagrams and have created the following model.
The MRW thread can be seen here > http://s9.zetaboards.com/MRW_Forums/topic/7101030/2
It has been slightly scaled up since that first screenshot was taken and the newer model is seen below with Northern Rock.
Ben