Hi Playing with Fire, I think the background from another thread was that your finances are mingled with theirs through a co-signed loan by your partner? So, technically even though a lot of good advice would be that you can't change them blah, blah, you are actually trying to minimize the fallout in your own life. Is that accurate?
This is US centric, but may help with what you are looking for. Some quotes below, maybe that you could pull out of it and use, changing to UK where appropriate (I wouldn't send the whole thing).
http://www.christian-attorney.net/bible_bankruptcy.html"At the end of every seven years you shall grant a release of debts. And this is the form of the release: Every creditor who has lent anything to his neighbor shall release it; he shall not require it of his neighbor or his brother, because it is called the LORD's release" (Deuteronomy 15:1-2).
Jesus, in two (2) parables, used the illustration of forgiveness of a financial debt to teach about God's forgiveness and the requirement that mankind forgive (see Matthew 18:21-35 and Luke 7:36-50). "And when they had nothing with which to repay, he freely forgave them both" (Luke 7:42). On a spiritual level, by the grace and mercy of God, Jesus gave us a "fresh start" by canceling all our “sin” debts through His suffering and death on the cross. On an economic level, our nation will graciously help overburdened debtors, if necessary, by giving them a fresh start economically.
A guiding principle of U.S. bankruptcy law requires persons who file for bankruptcy to have "clean hands." Accordingly, a debtor may not be freed from debts involving fraud, drunk driving, and deliberate wrongdoing. Moreover, bankruptcy law does not allow the discharge of child support and alimony debts. Further, most student loans, taxes (Romans 13:1,4,7) and secured loans are not forgiven in bankruptcy. Through these restrictions, bankruptcy laws seek to balance justice and equity (Proverbs 1:3).