This contains 'The Run', by Chris Priest, which according to Wikipedia is Mr Priest's first published work. It also contains "Brother John", one of the 'measures' in Pavane by Keith Roberts.
This was, I believe, the house in which Geoff Ryman lived and the OUSFG library (and librarian) were situated back in the day. Bonfiglioli was, of course, author of a number of comic novels about a dodgy art dealer.
I am not quite sure where I got the magazine, I dimly recall having a pile of SF given to me by one of my Dad's friends when I was off school, ill.
I will take the normal occult measures to prevent this magazine vanishing back into the vortext.