Pat Mills mentions this in 'Kiss My Axe'. Apparently the guy who put it together failed / chose not to credit Pat Mills anywhere. This does not go down well with Pat!
Art credits, in order from the top of your page:
Greg Staples
Paolo Parente (it's the cover of Prog 1091)
you've written Glenn Fabry but I think it's actually Dermot Power (doing his best Fabry impression!)
Jason Brashill (it's the cover to Prog 1024)
Dermot Power
I recognise this but can't remember what MG stands for - Mark something I think?
Paolo Parente again
Clint Langley (It's the cover of Prog 998)