Hi,
Thank you for reading and replying to my post. The photographic studio is Alexander Bassano of Bond Street and Piccadilly which, according to Wikipedia, wasn't at Bond Street until 1877. The guardian was Thomas Clarke (1845-1904) Maltster of Derby. I attach both photographs, though I don't really know if this helps. It would be nice to put a name to person in the photographs (which was the original motivation for my research).