If you feel that you are in danger and need to leave then you can access refuge services to offer you a temporary solution and enable you (and your children) to leave immediately, giving you time to make future plans.
Please see the Refuge section of this site
However, if you are living in a house where your partner is the owner or named tenant, or you are joint owner or tenant (and either wish to remain in your home or to find alternative accommodation) then you can seek advice from various sources.