As far I'm aware, Care costs are paid for (or not) by the person that needs them. Even if you are a happily married couple, you cannot be forced to pay for your spouse's care. The fact that you are separated doesn't impact one way or the other. He would be liable for his care whether married to you or not. It also means children are not liable to pay for their parent's care even if they've got the money. You can't be forced to pay for anyone's care, only your own. My mum has just gone into care so I've been researching it.
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Water Pollution -“ A National Disgrace”? A case for renationalisation?