Triumph 3SW

Yep, it's a crappy photo but there's something fun and evocative about it. The bike is a Triumph 3SW, best guess is that the photo was taken early post-war and that the bike is an army surplus machine. The tractor looks like a Ferguson TE20 and they came out 1946.

Triumph 3SW and Ferguson TE20.

Postscript: cheers Matt for pointing out that the bike is actually more likely pre-War and not ex-WD due to the chrome in evidence on the machine. Yep, I agree, probably so.