Hi Garvin, I had wondered why the photographer had made this pair the main point of focus, but the thought had not occurred to me I recall seeing another photo in a book of him (in earlier times) at possibly Bisley with some army types testing the underlevers, will go and have a mooch. I wonder if the family have anything from that period in his life as a reference.
Anyway, thanks for all the replies / input...the upload is free from copyright if anyone wants to have a go at printing it