Arrogantcat, I hope you are ok. I sincerely hope that you are.
Please read the link that Custardo provided.
If you would find it easier to talk to someone, please phone women's aid on 0808 2000 247.
Are you safe now? Is he in the house? If you're safe, then collect a bag, with changes of clothes, passports, bank statements, wage slips, any valuables, anything for benefit entitlements (tax credit notices, child benefit).
If you do go into a refuge, then don't worry. The refuge will help sort out a new school. They may also be abe to place a shield on your DC's names, so that your partner wouldn't be able to find out where you are that way.
I'd also echo talking to the police. He has assaulted you. This is not right, in the slightest.
Also, do you have any money available for now, in case you do need to move to a refuge which is some distance away?
Most importantly, do you know how to clear your browsing history? Cookies? Things like that? That's an important thing to keep in mind, as if this page is not in your cookies/history, he won't be able to trace it. If you can, start subsequent visits to this page in "private browsing", if you're not already.