Yes, and you'll often need a bank account anyway with Paypal because you need somewhere to withdraw the money to, iyswim.
I have spent a few days thinking about this thread, on and off. What I would do, how that could so easily have been me, etc.
I thought about convoluted ways in which you could speed the passage of your leaving. Like, if you have any friends anywhere in the country, posting important sentimental stuff to them to store so that you have less to carry. BUT ultimately without help from family or friends, you are realistically going to have to use women's aid.
I sort of know how it is. I ended up taking out a loan for three grand to fund the cost of moving out, and I'll be paying it off for the next three years. But it was worth it because I am free. I used XP's credit history to ensure the loan was approved, though (have been a SAHM for years). We took it out as a joint loan and I do all the repayments. Not ideal but the only way I could think of. And he knew what was going on obviously, and made the last few months sheer hell for me.
Basically, your council may well have a tenancy deposit loan scheme where they will loan you some or all of the cost of the deposit for a rental property. But they will inevitably write to you. So will housing associations, letting agents will phone you in the day when he is listening, you need to goo off to view properties and find an excuse for the time away, and at some point you will have to tell him you are moving because you will be packing stuff. Not to mention claiming for benefits etc, they will send you stuff in the post and he WILL probably end up seeing it.
If you look at this in purely practical terms, it doesn't make sense. What you should do is just go. Use the wonderful support that we are lucky enough to have in this country to ensure that you are collected from a station or location nearby with your children, just take important paperwork and a few small items of sentimental value, and forget the rest. You will build it all up again, it's just stuff. What is more important is that you will have escaped from him, from a situation that by the sounds of it is getting PROGRESSIVELY WORSE. This means in logical terms that it will, at some point, reach a point when your fears are realized and you ARE too weakened, demotivated and entrapped to ever leave. And by God, that would be terrible for you, not to mention your children. Don't let it get to that point. Take the last remains of your courage and drive and the scraps of the bright, confident person you no doubt once were and just leave. Phone WA, ask for help and then get the hell out of there. By all means plan this bit carefully, but don't dally. Ask for help, work out what you need to do, where, when. Get what you need. And then go.
Good luck