Various collectives of swash buckling knights in the field of metal:
Metal Hammer - The Pro's!
Cack Blabbath - A very good group of guys - good reviewers and put on local gigs in the Midlands (including Twitrfest!)
This Is Not A Scene - Recently merged with Alt Matter. Once of the largest & most comprehensive metal 'zines on the Internet.
Thrash Hits - Know their shit. Make good funnies too.