OP you need to leave permanently at the earliest opportunity - this is a serious escalation. Something has triggered such a drastic act and it’s likely that whatever it is will do so again (not you btw).
Who’s house is it? Is it your name? Please report this to the police straight away. Do you have any physical injuries that can be documented? If so, take some pictures.
You can speak to the National Women’s Aid line. Hopefully they will be able to point you in the direct of local domestic violence support services and you’ll benefit from an IDVA (independent domestic violence advisor) they will be able to help with a plan of action. They’re amazing at knowing about finances, legal routes, housing etc. You’re not on your own OP, help is out there but you need to reach out first.
If you’ve not already, either ask a family member to go with you or go on your behalf to collect some emergency essentials if you think it safe to do so. Things like ID, passport, medication etc. If not safe then don’t worry about it for now.
There’s always the possibility of a temporary refuge for a safe place for you and your children to consider also. Please don’t minimise this in the morning OP (I see this a lot in my line of work). It’s not fair at all that the onus is on you to safeguard yourself and your children but it’s important that you take the right steps now to prevent further incidents and exposing your children to his violence.
Good luck OP, let us know how you get on