Nocapes I read your post earlier and didn't get chance to reply, I am so pleased to come back and see this update - you're amazing well done for taking such an important first step! I work with people in abusive relationships a lot and many never even get this far, so you're already ahead of the game. You need to follow it through now and don't let it settle back down. Keep that fire in your belly going and get the useless shit out of your house along with all of his stuff so he has nothing to come back for. If there are things that he says he bought that you need (such as a washing machine etc) keep them, you and the Children need them and he will have to prove ownership at small claims of need be but don't let him bully
You into thinking he can take stuff that you genuinely can't live without.
Once he's gone and the Dust settles he will inevitably expect you to calm down and take him back (after all you can't live without him, right?!! 
) but DO NOT let him minimise any of this and don't let yourself minimise it. I see so many people leave relationships but after a week or two when they have a bad day, the abuse, the injury, the bruising, the isolation, it wasn't really as bad as I thought was it? I miss him and he will
Change, I am
Just over reacting, I feel
Guilty that he's missing the children etc. Whatever it is you feel is normal, but you must go past it and you must remember that this relationship is not happy and is not safe. Your children will be happier and better off, as will you be, without him there. If he is a good dad (which seems questionable based on your information) then it's up to you what access you grant him but make sure you do so through a contact centre or a trusted third party so that he doesn't use them against you or to worm
His way back in with how lovely he can be and "isn't it a shame we aren't all a family anymore". If you feel the children are better off not seeing him then you do have the power to say so and withhold contact. I know that may sound harsh I don't mean it to be but i am just telling you in case you feel you have to let him see them - you don't.
Keep it up, Wonder Woman. You've done amazingly, there will be hard days to come I'm
Sure but they will pass. If you let him stay, there will be worse days and they will repeat on you until he leaves. You are doing the right thing.
If your children question it, just remember that in the future they WILL understand why you did this. Try to remember that if they ended up in an abusive relationship because of the example of this relationship, they would be alot worse off and would rightly question why you didn't leave - any anger they show at you now is the lesser of two evils and time they'll realise it was the best thing for you all.
There are a lot of places you can call for support,'women's aid is a great start but others will depend on where you are.
And if he refuses to leave call the police, they can assist with getting him out (and it will also make sure they have a record of your address should you have further problems and would support you making complaints against him, if you needed to).
Change your phone number if you can so that he doesn't start harassing you via text etc, block him from all social media, along with any of his family friends and mutual friends who he may use to try to get to you, other than about the children. I would suggest having a solicitor make those arrangements if you can. Get added security on the house such as new locks, lights, alarms etc. Again women's aid may be able to help you with this. If he turns up being abusive, drunk, aggregate etc then call 999 immediately.
If he does start harassing you in any way please report that to the police. It will enable them to provide you with a lot of other support through their domestic abuse officers. It may not necessarily result in arrest etc if you didn't want or if it didn't warrant it but it gets you on the radar if there are worse problems with him down the line. You say he can be bitter and make life difficult so I think you really need to think about protecting yourself and the children. You said you aren't scared of him but if he is capable of treating you so badly now it isn't a huge leap for him to become verbally and physically aggressive. Should this come to a point that he needs arresting and prosecuting then the more evidence you have; the stronger the likelihood so keep A record of absolutely anything that is out of line, messages phone calls or physical altercations and arguments. Have someone else with you if you need to see him to prevent anything happening or to at least provide witness to anything untoward.
You've got so much amazing support here, we are all behind you. Well done. Can't wait to read that he's out of the house. Xx
(Sorry for bad typing...little sleep!) xxx