I am from the UK and I have just got my code so check your email chaps.
When did you register for the demo? I did it last night about 9pm as I only noticed it then. I am also in UK but have not received anything.
I registered for the demo on the 2nd of this month, nearly 2 weeks ago but I don't think it matters when you registered as long as you did it before the deadline. Have you got it yet? Or anyone else from the Uk?