Hello. sorry I have not replied before, I have been really busy.
I'm afraid my father doesn't recognize any of the individuals in the photograph, although obviously the farm amd the family are the same. He thinks the younger man looks like his grandfather Wiliam McColl, however as the writing on the back suggests otherwise it may be no more than a family resemblance. My father was born in 1934 so the people in the photo would be much older, and maybe even dead by the time my father would be able to remember. Sorry.
I will postmore family information soon, when I have more time.