Wow that BSA scope rings a bell Alistair! I had one on my Panther Deluxe when I 'upgraded' from a Gat around 1979. It was attached using a terrible Crosman two-piece mount IIRC and kept coming loose. Eventually I ditched it for the far superior Crosman 766 rifle when I could afford to buy it off my mate. He was a rich kid whose dad gave him air rifles in lieu of affection. I had plenty of the latter but not enough of the former.
The sparrow population in my area dropped immediately. Of course I wouldn't dream of shooting one now but they were considered 'pests' back then...