Just received this.
We're sorry that you didn't receive your iPhone 4S today - we understand that you may be disappointed.
We were told late yesterday afternoon that there was a dispatch problem in our warehouse which affected a small number of orders. We're pleased to say that the problem has now been fixed, and we can confirm that Royal Mail will deliver your order by 2pm tomorrow, Saturday 15th October.
Guess its tomorrow.
Just got the same email and had it confirmed by Three assistant on phone. A day late isn't that bad though.