My Dad came across some pictures of both my Great Grandads who served during WW1. As part of the family history, he is trying to find out which unit they belonged to (he is also trying to get hold of their service records). He thinks one is possibly Royal Artillery (first two pics) and the other is Royal Horse Artillery, but is not clear on the regiment. Grateful if anyone who is up on the uniforms of this era can shed any light on which unit they are from. If it helps, both are from Lancashire (Chorley and Wigan). p.s. Both survived the Great War, only for one of them to get killed as a plate-layer a few years later on an LMS Railway line.