What’s the long term financial picture? I know in the States, you can get an order for temporary support, which usually favors him paying enough to keep you and the kids staying in the home until the divorce is worked out. But if he can’t afford to pay enough to help you with your rent while living elsewhere now, how is he going to afford to pay you adequate child support in the future? Is this an issue because of a temporary drop in your income during maternity leave? Would you benefit from moving home to England and dyeing with your parents? Would he allow that?
Have you discussed this with your attorney? It helps to have an idea of what the financial picture is going to look like going forward, so you can plan accordingly.