If it is of any use, there was a Jimmy Wimbush(1st name Reuben, but known as Jimmy) who lived in Wetherby in the 1960s- approx. 1980. He was connected with the racing stables in town, and had been connected with horse racing all his life. I think that he was a single man. He died some years ago, possibly in the 1980's. He may have had connection with the Doncaster area, but I may be well out with that. It was, to me, an unusual surname, as I had never heard it before. Whilst looking for other stuff on this site this morning, I spotted the surname, and it made me curious.
Regards,
pityackafromblyth.