I have found the photo below amid a collection of family photographs. I don't think it's a relative, as we don't – to my knowledge – have any boxers in the family. But I am hoping to identify who this is. The only clue I have is that the word "Butler" is scribbled on the back. Is that perhaps the chap's name? I have no idea on a date, maybe early to mid 20th century? Presumably in England, but I suppose could be from anywhere.
Any ideas on who this is or how I might find out who this is?