I'm a bit late, but as KFdancer said, he can't take extra benefits for you as you are subject to immigration control. It's up to you to ensure that you don't take public funds that you are not allowed as that would be in breach of your visa, so don't rely on the benefits agencies to get that right as they are not immigration experts.
e.g.
If your husband is under age 35, then he could claim the Shared Accommodation rate for Housing Benefit. He can't take the Couple rate (1 Bedroom) because you can't have that public fund.
He might be on the new welfare system for income based benefits, called Universal Credit, instead of the old Housing Benefit that is getting replaced. I'm assuming that the housing element of Universal Credit, has the same rules.
https://www.gov.uk/universal-credit