I have attached a couple of photos. One is Mike(?) Goldstraw, our visiting boiler man, having a look at the kettle off Excalibur, which is in bits for its ten-yearly overhaul. The boiler itself is in quite good shape, thanks to ten years of being fed treated water.
The other shot shows what an Exmoor looks like in bits, Things are not so rosy below the waist, however, and there was enough play in the reverser and valve gear to give wide port openings even in mid-gear!
Thanks to Max Birchenough for the information and photographs.