I've got issues 14, 15, 18 - 20, 22, 23, 32 - 55 of Atmosphere / ATM so if there's any info you need on the issues just let me know.
The Mathmatix mag that Ornette mentions only last one issue I think and then turned into Atm update which ran for another 2 issues. I have these aswell.
Always preferred Atmosphere over Knowledge due to the DJ charts and dubplate reviews.
I never managed to pick up any of the smaller local scene magazines up in Yorkshire and can't recall any bases in the North that covered jungle / dnb.