I was interviewed 29th Jan, and have just received an offer for the Gateway on Friday! And, because I did so well 'apparently' they've made me an offer for the 5 year too! Woohoo! So pleased!
The part about attending a selective state school since the age of 11 means that it can't be a private school, not that it all has to be in one go without any breaks, so long as you have had nothing to do with a private school past 11 years of age you're good :-)