God I'm knackered!
Well.... all in all, it was a great party. No gatecrashers involved!
I am glad actually that it was the first lot to arrive who carried in such a lot of booze (in front of the dad which I still can't get my head round). I made him put the Pimms back in the car and took away the cider and one 10 pack of Bud. It made me much more on my guard for what others may bring. I am just so annoyed with the boy who bought the Gin and that we failed to notice it. We found out the name of who it was and when he heard we knew who it was, to his credit, he purposely came to find me and apologise. He was extremely sorry and remorseful. We told him he had to go home and he totally understood and accepted he had been wrong to bring it but he couldn't get hold of his parents. He had to stay but kept coming up to me and dh to apologise and was not drunk himself in the slightest!
I am disappointed that my ds was one of 3 who got so drunk they were sick. The other two had their parents called and they were picked up. DS can't remember much beyond 8.30pm. His loss. There will be 60 of his friends reliving the event on Monday at school and he won't have a clue what they are talking about.
There was no nudity, sex (on or under the trampoline 
), drugs of any description or police involvement.
What I have learned is....
I am SO glad I took down names and numbers - I used two of them and made them all realise that parents would be called if necessary.
They don't stay inside - they spent most of the night outside freezing and I am therefore glad I charged the halogen torch!
They didn't eat much food AT ALL.
Never to offer the sleepover part for any of them at the end. Because I called it off, I was so pleased to just go to bed and not worry what they would be getting up to.
Myself, dh and other mum spent most of the evening within the throes of the party, which I really didn't expect. (I had visions of us sitting quietly in the lounge watching Eurovision!!) The kids didn't seem to mind and in fact one girl said she was glad of our presence, even when they saw us pouring beer/cider away! Whenever we found a bottle of booze it was emptied away. I think because it was outside, and dark for a lot of it, they didn't really notice we were there.
About half of them didn't bring drink or drink anything at all - they were't interested.
DS has some bloody amazing friends who really care and look out for each other. Their parents should be proud of them and I really wish ds was one of those who could be like this. He is an all or nothing kind of boy and I don't doubt he won't do it again 
So... ds is still sleeping it off. He has to help clear up his own vomit, revise, finish homework and do some cooking for D of E today. Shame...