Thank you all for your replies.
I really appreciate your advice & it makes perfect sense to me to not use his Christmas presents as a consequence.
We have asked for help with regards to his behaviour in the past. I have been to the GP twice over the years but they will not offer any help unless he is referred by his school.
We have spoken to his school many times over the years, but because they don't have any problems with him at school they will not refer him.
They have said they will support us & have chats with him about his behaviour but he says & does all of the right things so there appears to be no issue.
He makes life very miserable for us all if he doesn't get his own way. I have read The Explosive Child which did help me understand more but it hasn't helped with his behaviour.
His behaviour started before we became pregnant with his Sister. We also have a 19 month old boy who he adores.
He says things like you can't control me, I can do what I want.
At the age of 5 we asked for a referral to a child development specialist as he was withholding his poo. We had tried everything but nothing helped. (He potty trained himself at 2 years 3 months. No issues, then he started nursery at 3 years 2 months & that's when it started.) The C.D.S gave us advice, use experiences rather than toys/magazines as rewards. He explained it was a control issue. (Children can control, sleeping, eating & toileting & he is using withholding as his control.)
Nothing we did helped he just got used to managing his withholding. He still holds his poo now for a few mins/hours but he goes every day so no issue.
Over the years he has hit me, bitten me, pulled my hair, kicked me. This happens when he is in a rage. He is wild when this happens screaming & wanting to fight us. (I have told the school about this but they have said its normal.) When he was 6 he slapped me across the face as I wouldn't let him go to a friend's house. (I say friend but him & the boy didn't get on.) I said, right that's it, no tv when we get home. He apologised but was still angry. I leant over to do up his seatbelt, he pulled me in by my scarf & shouted in my face, I said I was sorry.
He hasn't been physically aggresive for about a year but previously it could happen once a month or once every 6 months.
I remember the 1st time he showed behaviour like this was when he was 3.5 years old. I'd bought him a glow in the dark book, he loved it. I gave it to him in the car after I picked him up from nursery. He then insisted he wanted a toy, I explained the book was lovely & he wasn't having a toy as well. In the car he got angry, he said I will take Daddy's hammer & smash the car. If the hammer breaks I will get scellotape & put it back together so I can smash it again.
I am rambling, sorry. We give consequences but it doesn't work.