Hi Les
you make an assumption that there were English country dance bands in the 19th century. I'm not saying there weren't, but .... I would have thought most of the evidence is that there would be an individual musician, or couple of musicians ... not a band as such ... But then.. there were village bands (featuring brass etc) who would/could no doubt play a variety of repertoire styles.
Have a look at the Musical traditions site - anything there?
Let's see if the Village Music people have a look at this thread...
Derek
ps, if you do find any photos, I'd be interested in seeing them.