Have you tried bluffing? Turn up at the ex's with your cases and say, as we are still married I thought that it was only right we live together......."...and I put your name on a £15,000 load I took out, and as I won't be in the country to pay it the bailiffs will be coming here for the money" :P

I gave my ex a list of things I'd come up with to 'ruin' her life, she signed the divorce papers 3 days later