This is for my fellow peps in Europe who are having trouble connecting to multiplayer matches on Battlefield 3 on Xbox, this is taken from battlelog, lets hope it fixes the issues:

Maintenance on Xbox 360 Servers [EU]
By: zh1nt0Posted: 18 hours ago 277 commentsWe are going to perform some maintenance on our Xbox 360 servers in Europe. Some players may be kicked from their current games. The outage will last for a maximum of 2 hours. The maintenance should hopefully resolve some of the "Failed to connect" issues that some players are seeing. We´re very sorry for the inconvenience.

It won't fix anything. BF3 is broken on all platforms. Let's just hope CoD gets it right.