Just got off the phone to Apple. Due to the volume of orders (!) email confirmations might take up to 24hrs to come through but as long as you have an order number (W********) you're good to go. You can stop worrying as long as you've got a W-code
Rep was able to call up my order and confirmed it was all approved etc.
So, off to Bristol this arvo. Can't decide to go and see what the deal is at Cripps ;-)
or be really jammy and go there tomorrow on the off chance. I must say I feel better now the pressure is off (I can wait til late April if that's what it takes)
Thanks for the info