Help with marks please - Silver 'shot' cups

Hi there,
I recently got 6 of these in a job lot in an auction.
I think one set of marks are import marks (1980), but the others are a puzzle - can anyone help please?
Regards
John
Tot3.JPG
Tot1.JPG

https://www.925-1000.com/importmarks.html

Birmingham, 1980. KLD - K L Downes (1977 - 1987).