As a UK citizen I'm with Sky Broadband and after some research it seems like they're blocking Mediafire. I can ping mediafire and get a reply but when I type the address in I get error 404. I thought the site was down but its not. Now I know I'm probably not the only british user on this site with sky so I thought it best to post this here so people can continue to still download roms.
Just right click on any link directed to mediafire, for instance TripNRavers roms or Wolfbreaks Rom. Choose copy shortcut and go onto www.kproxy.com and right click paste into the proxy url bar and press enter. Bingo you're back on mediafire downloading the fantastic roms the developers create!