You aren't married and I'm assuming you rent. Who's name is on the tenancy? If it's joint, you both have equal rights to be in the home. You legally can't lock him out. If that's the case, you'll need to find out if you have legal grounds to have him removed or if you have any 'leverage' at all. I'd suggest seeing a solicitor for that and for child maintenance. If the tenancy is in his name, you're probably out of luck, but ask a solicitor about that, too.
You want to know whether you'll be able to stay or will need to find a cheaper place to live. I wouldn't ask him to leave until knew I could afford the place on my own long term, not just until my savings were gone. So, if you want to stay put, first thing is to get an idea of your income (wages, benefits, child maintenance) vs the costs of running the household, baby supplies, etc. Be aware that some men will quit work, work for cash, or take a cut in pay to avoid paying support. You'll need to think about that possibility if you think he's 'that kind'.
Next, locate (and preferably hide) all important documents. Rent contract, bank statements or information, birth certificates, proof of his income (wage stub, tax return). If you can't hide them without raising suspicion, take pictures of them with your phone.
If you don't have a password on your phone, you need one now. If he raises a question tell him 'a friend of a friend' had their phone stolen and the thief used it to steal their identity or something. You need to tighten your internet security. Change passwords and use private browsing.
I haven't read your other threads, but PP says that there is some kind of camera set up that he monitors? Either turn it off, break it (knock it over?) or just be aware that it's there as you do your preparations.
Here's the most important thing: does he have PR? Is his name on the birth certificate? Because something very important to remember is that in the UK both parents have equal rights to a child. This means that, absent a court order to the contrary, if he takes your child 'for a visit' and keeps her, you cannot make him give her back. The police will not help you. It will take a court order. If you think this is a likely scenario, it is vital that you see a solicitor before you either leave or kick him out and get the ball rolling towards a court order setting out residency and access.
All of the above naturally needs to be done as quietly (and quickly) as possible. You want to avoid raising any suspicions.
You say that family is far away and 'not an option'. Even if they are distant, they can still be a support. If there is an estrangement and if there is the possibility of building bridges, now would be the time to do so. But if they're worthless or abusive, obviously that's out of the question.
As far as friends, think very hard. Is there one person you think would be on your side or be willing to help you out? Even if someone is not a close friend, that doesn't mean they won't help. And if you have friends you've drifted away from, is it because he alienated them or quietly coerced you to drop friendships? If so, reconnect.
Even if you truly have no one to help, you can still do this. I'm sure there are plenty of organizations out there for you. I'm not in the UK, so hopefully others will be along behind me to give you some names! I know there's Women's Aid and someone above mentioned Gingerbread.
Good luck. Take a deep breath, don't rush. Move quietly but deliberately and those ducks will be in a row before you know it!
