Hello Ken,
Thanks for the response. Yes the photo is the only clue I have about the regiment, I was in Liverpool several years ago and went into the King's Reg. recruiting Office when they still had one. The Captain behind the desk identified him as having a silver cap badge, which he said had been provided to each of the Pals volunteers by Lord Derby. I can't recall him ever saying anything about the Border Regt, and it's base is a fair way from Liverpool, nor did he say very much about the whole experience. Certainly the 33138 number is in the right range for Liverpool Pals 18th., but if the number changes with each regiment, and I only found out last night that it did, then it's fairly meaningless. He has no Star, so I guess he didn't make it to the front until after 1915 although the first Pals K.I.A. I found was 20-12-15.
There was some mention of him being involved in training, but don't know where, when, or if indeed it's true and where it sits in respect of the Blighty. He was Blightied while out on patrol, so that's not going to provide much of a clue either.
I don't know about Uncle Bob, RJB, he was a Delivery Clerk in the Post Office at the time, with no Engineering skills that were ever manifested before or after. He, too, survived and worked the rest of his life in the P.O. in Liverpool.
Thanks once again,
Pete