No problems, at least that means you shouldnt lose any contribution to household bills from your hubby if he proposes an IVA then.
As for rent, Im not sure what is allowed for this and whether it is the same rules as for household bills - but probably is - maybe someone else can suggest?
You should probably take it, for now, that hubby will contribute 40% towards household (shared) bills and rent. So use that figure to work out his disposable income. You do this by getting him to do a income and expenditure review. Take his income only, then minus all the reasonable expenditure from it (based on 40% for shared/household bills). Note, things like sky subscription and holiday funds will most probably not be allowed - so you shouldnt list these (sorry but if you wont those, it will have to be you who pays). Things like petrol, car maintenance/insurance, prescriptions, dentist, glasses/contacts, clothes, phone, contingency + all household stuff (IE food, utilities, house insurance), kids bits and bobs if you have kids, etc is. Just try and think of any & all regular spends that are essential. Anyway, when you have subtracted those expenditures from income what you have left is the disposable income which is what you are expected to pay into your IVA.
If you want, you can post the results and someone will advise if a IVA is suitable for your hubby. It would help if you list who he owes what to in terms of the unsecured debt, and the disposable income.