hi,not sure if this is totally relevant to you op as circumstances slightly different anyway
i was on Income Support,ctc, etc as a single parent with 3 DC's,anyway i was paying towards my home morgage and endownment,anyway my ex partner died and that resulted in the endowment paying out £40,000 to me which then took me over the income support threshold hugeley
anyway i spoke to them DWP and cut along story short they let me clear morgage which was £29,000 which left me with 11,000 cash,so they also let me pay of credit card debt £3,000 a few other debts which then bought it down,they stopped my claim as soon as the cheque was cashed but once they had all receipts my benefit was re-enstated
I cant praise the DWP high enough and were very helpful and generous as to what i could pay of and still keep my entitlememt
some people say if you pay debts of they will treat it as you have deprieved yourself,but i found as long as they were reasonable and hadnt been created just to gain benefit they were very helpful
hope this helps