What happens if my British husband stops paying his UK student loan debts?

We live in America and my husband still has UK student debts. He has thought about not paying them for a while and then waiting until they are transferred to a collection agency over here. We are thinking that if they are sent to a collection agency we could negotiate an overall lower lump sum payment Is this a good idea? Will this ruin our credit scores if his debt is sent to a collection agencyWhat happens if my British husband stops paying his UK student loan debts?
Honestly, I don't know much about international exchanges of debt and collections (ie how long it takes, etc) But I can say that any debt that goes to collections will ruin your credit score. Even if you leave debt in a checking account unpaid, it will go to collections and that will negatively affect your credit score. With collections on your credit report, it would be very difficult to obtain credit with your husband's name associated. That may not seem like much of an issue, however his income cannot ethically be considered as a source for repaying a loan if he is not on the loan application. Mostly because if a person is not on a loan, they are not responsible for repayment. Any amount in collection can make a difference. For example, I recently heard about a coworker with a customer in great standing, however he has a collections notice on his credit report for just over 100 and he was declined for a secured loan. Just goes to show how much it counts. Simply put, it's not a good thing to even consider because of the risks. Hope this helps.