Good luck to all those waiting. I was last year and it was horrible. Email came late afternoon iirc, if that helps anyone.
A word to the wise though. Our DS said he was fine about whichever school he got before the email came. He didn't get the school he wanted which was the one his friends got. We (parents) were very upset, but didn't show it. He said it was fine, he'd be ok, started talking about the new school etc. We bigged up the school he was allocated to, and set about appealing. We told him that we were appeaing, but in the same breath, told him there was little chance he would get his first choice school, so to assume he was going to the other one.
Fast forward several stressful months of being in pre-appeal limbo land. It is not fun btw (appealing, that is), get support on here if you do end up going down that route. We win the appeal. DS tells us that he had been really sad and stressed about not getting his first choice school. He hadn't told us because he didn't want us to be worried for him. I wish I had known though, because he went through months of uncertainty (as we did), but felt he couldn't talk to us about it. It must have been a horrid time for him - it felt bad enough for us!
Moral of the story - don't necessarily take what your child says at face value. Even at 11, your children might be trying to protect your feelings! Bless him, to this day I am still not sure why he did it. I thought we did such a good job of being blase and happy about the second choice school.
Anyhoo, good luck. Hopefully by this time tomorrow, you will at least know!