What clubs have hosted it in the past?
I know it's been at Ponte since I got back into shooting a few years ago, but I remember going in the mid 90s and I have some recollection that it was down the M1 somewhere. The name Codnor sort of rings a bell, and I'm sure where we went was in Chesterfield area but it must have been a different ground to one they have now. The ground had a covered shooting point like Pontefract. I don't think it was LNER where they are now either.
I was shooting my old 77K with Simmons 2-7x32 scope and it was the first time I'd seen scopes with big sidewheels and guns with thermometers.
I remember it was bloody hot when I went though! A few shooters complaining of extreme temp shifts in ranging.
Could have been '93 maybe.