I'm glad you're safe. Okay, to practicalities.
As I understand it, with no income, you would be entitled to claim income support, housing benefit, council tax benefit, etc.
[Bear in mind as benefit changes are currently being 'rolled out' across the country, some things may be being applied differently in your area, but the entitlement would still be there].
[While you would be entitled to apply for social housing] If you and your husband are currently in social housing, some authorities may view that you have made yourself homeless (yes, even if a marriage has broken down).
That does not mean that you can't apply, nor does it mean that you can't leave, but it might be prudent to speak to your Housing Officer first, emphasising whatever you need to ... breakdown of marriage; the need to leave; that you cannot stay with friends as H might come looking for a fight ; that you could not retain the family home (as H's friends and family live close by) so would wish to be housed away from the area. You can do this confidentially, asking that they do not inform your H, do not contact you at that address, etc.
You can also talk to your Housing Officer about private rental. I know you do not have money for a deposit/bond but many local authorities are now operating a Guaranteed Deposit Scheme with registered private landlords.
The first thing to decide, I suppose, is whether there is any way forward within your marriage. If your H were in agreement, would you first want to try something like counselling to see if your marriage can be saved.
If not, then you still have to decide whether you want to talk the break-up through with you husband, ahead of time.
This is a lot to think about, but if you really cannot talk to your H about all this, then it is certainly possible to set a lot of it up ahead of leaving the family home. The Citizens Advice will be able to help you by informing you of all entitlements and facilities available in your area.
Hopefully, will be able to tell you about emotional support near by, too. They are a good place to start.