Hi Anne
First, thanks again for the information. It seems highly likely that it is the Herbert Leslie that you found. I don't know if his daughter has his medals - I only communicate with her by snail mail, but I will definitely write to her and ask her!
I have been looking at some Machine Gun Corps sites on the web since last I heard from you, and found them very interesting. One of them, an old Comrade association, has asked for any old photos, so I think I will email them these.
I know quite a bit about his brothers from the Commonwealth War Graves Site. His brother Sidney died first, on 21st July 1915. I recently posted a photo of him to be restored on "Photo Restoration" and had some lovely answers. He was a corporal in the 7th battalion Kings Royal Corps. His service number was A/599. He was buried in the Bedford House Cemetery. I don't know anything about the circumstances of his death though, what battle it was etc. I have a photo of his gravestone, taken by my nephew on a school trip a few years ago. His other brother who died, Charles Henry Allen, died on 25th September 1915. His service number was 11391. He was in the 5th Battalion Oxford & Bucks Light Infantry. Again I don't know anything about which battle he would have died in. He has no known grave, and his name is inscribed on the Menin Gate at Ypres.
My grandad, their brother George Albert Allen, was in one of the South staffordshire regiments, but thankfully survived the war. Unfortunately I don't think his medals have survived in the family.
Hope this is of interest to you!
Thanks again! Judy