Whenever I talk to someone, I get huge lag from quest givers to the point where I can't actually play the game and have to log out.

I don't think it's my connection as others games are fine and I can see people walk around like normal. I just can't talk to NPCs. (I haven't tried combat).

I'm from the UK and heard something about BT problems but didn't get much information. Is there any fix at all?