Gosh, I can't keep up with all this information and the theories!!!

I have had a much longer look at your photo, Andy, and I am revising my date estimate to 1900-1905. I am basing this mostly on the lady on the left, her clothes look the most up to date and she does seem very fashionable

I don't think they are particularly upper-crust people...they could be working folk, dressed in their sunday best, or lower-middle-class.
Agree your man at left is holding what looks like a hunting whip, but there is no thong attached to the pointy end, so I don't think that's what it is. It is probably a cane but it's a very fine one.
I don't think the tassles on the older gent's brolly are of any particular significance. Maybe it's just his Sunday-best brolly!
Still can't help you with a location, but Yorkshire seems to be the odds-on favourite by the looks of things

Prue