This saddle is called a UP (Universal Pattern) and would have been used in the first World War.
A metal arch forming the pommel is screwed onto a wooden frame which is the tree of the saddle. The whole is slotted into a half pad of thick felt. The saddle weighs 31 lbs, the total weight with an average man would have been 281 lbs.
Information about this saddle can be found in Major G. Tilden, Horses and Saddlery (page 154) and also Animal Management 1908. (Page 191)
Provenance: purchased from Buttons Saddlery, Chobham 2006 by private collector £250