Blogs: The Warhammer Forum
From Grand Tournaments (GTs) to the European Team Championships (ETC), if you want to know about tournaments in and around the UK, The Warhammer Forum is the place to go. Not limited to 40k, the site also includes Warmachine/Hordes, Malifaux, and Fantasy, as well as various forums covering hobby and club interests. Various large Tournament Organisers (TO's) frequent the site, and often tickets and results will be available here first. If you're looking for tournament details, take a look.