Thanks all, it's the balance of helping with the new challenges of secondary school but taking no shit in the process.
As soon as he got home he was sheepish, he said he was sorry after I gave him a snack and hard stared at him with my arms crossed. He said he just felt so frustrated that he is doing great with organising his school bag and being organised with that, the missing rugby top flipped him over the edge and he felt like I was getting at him too much. So we have decided together, I will sort his sports kit and he will do his school bag for the time being, with secondary school being new etc.
We also have a code word of 'boomerang' which we both say which means to the other person 'back off or I'll flip" It's something I saw on a Dr Phil (USA) programme a while back, designed to make you stop when you are too caught up in the moment of madness, you both stop, walk away and regroup. It works, 90% of the time. You can use any word you want, just a word you both know.
He lost of his electronics for a three days.
He's dyslexic, and although I/he does not use this as an excuse for being hobby, it's how for him his frustration comes out, I said he needs to think of other ways to release the tension he can feel, I swim and also plug in headphones with acid house music joke loud on the cross trainer. He said he quite fancied a drum kit!
I think tough love and soft love are needed at this time!
(He's lost his locker key, for the 7th time, don't get me started!!!!!!!!)