Swan Arcade was a Victorian shopping arcade in the centre of Bradford, and was demolished in the 1960's to make way for concrete high rise buildings. I do not remember it as I was a bit young at the time, but it was close to the Wool Exchange, where wool from around the world was bought and sold.
Dave Brady lost his arm as the result of a motorcycling accident. Despite that, he played bass guitar with the group and, as previously mentioned, concertina.
Mike Harding used to relate a story about visiting a curry house on Leeds Road in Bradford where the curry was so hot that they ended up mopping their brows with a chapatti. Apparently Dave Brady was the other diner.
most of this information is third hand, so please excuse any inaccuracies.
GtD!