I have an old photo of a tandem in my Gt Grandmothers back yard, probably something my grandparents used to use, I guess circa 40's or 50's.
Not actual cycling, but my grandmother also worked in several cycle factories making chains etc, there was a lot of them in Brum back then.
Going further back, when I did family history research I found a couple of relatives going back to early 1900's late 1890's with trades of cycle worker or tube bender.