"I don't want to be walking on egg shells in future but, perhaps if he finds a way to put across what he thinks and I find a way of allowing him to do that, the aggression (or at least uncontrolled aggression or violence) wouldn't rear it's ugly head. I realise this may be unrealistic but I honestly think I couldn't end things now without always wondering what if we'd tried such and such.
I obviously realise there is a risk in doing so but I'm certain it would be me and not the children on the receiving end (at least until they're teenage and by then I'd like to think we'd know if whatever it is had worked)"
Ah the sunken costs fallacy yet again. You forget though that the damage has already been done. And yes what you have written above is unrealistic, infact completely unrealistic. He now has the green light to be violent again and he will.
By the time your children are teenagers they would likely have seen many years of him being violent towards you and regard that as "normal". Its all very well and good for you to try and save this but what is he really doing here?. Answer - paying lip service to the problem. You continue to minimise and downplay this out of your own perceived fears (of social services, the effects of same on his career prospects), shame (any shame here should be all his) and embarrassment (again totally misplaced on your part).
All your words here are those of a women in a domestic violence relationship along with the proposed "solutions". He has not addressed his alcohol either but has chosen to blame everything else like you, long hours and his dyslexia!. Ha bloody ha.
His parents and yours have a vested interest in this like yourself and have downplayed the whole situation also. Families are rubbish to talk to in such situations as they are often over invested for their own reasons. You'd be better off talking to Womens Aid and writing on here further.
You're already blaming yourself for his behaviour and continue to try to do so as not to set him off. That did not work because his own drinking was a factor in him being violent towards you last time.
He is still going to this stag do as well isn't he?.
Why are you so afraid to call this what this really is - he is being violent towards you in your own home and you are being attacked. The home for your boys is no longer a sanctuary for them because their dad has decided for his own reasons to conduct his own private war against their mum.
Why are you also so afraid of any potential Social Services involvement; they are there to help families, not castigate them. They will become further involved with you personally though it you are shown to be putting your H before them by continuing to allow yourself to stay in a violent household. Your children won't thank you for staying with an inherently violent man either and could well grow up to become violent themselves within their own adult relationships.
And never write again that he is a wonderful father because such men do not hit their wives ever. Women usually write that comment as well when they really can say nothing at all positive about their man.
He hits you because he can and enjoys the dominance. He also enjoys the power and control. This is what this is all about at its heart.