The UK and Ireland Call of Duty 4: Modern Warfare Xbox 360 beta kicks off tomorrow and you'll be an official Activision Clearance Code which can be obtained from either Game, Eurogamer of Gamespot. Don;t mess about if you want one.

The beta will enable players to experience the most advanced and powerful arsenal of modern day firepower in customizable multiplayer battles from the world’s most treacherous hotspots. Players will be able to customize their experiences by utilizing new features including create-a-class, player-ranking and the new perk system. Gamers will also be able to ease seamlessly into multiplayer matchmaking with the party system or even join games in-progress. New recruits will enlist for battle across a series of action-packed maps and dynamic game modes to test their mettle in the ultimate multiplayer gameplay arena.

"From day one we’ve set out to make Call of Duty 4 the best multiplayer experience ever," said Grant Collier, Studio Head, Infinity Ward. "We’re excited to bring to our fans around the world this early look at Call of Duty 4 multiplayer. The gameplay possibilities are limitless from leveling-up and utilizing perks, to creating-your-own class and matchmaking."