Any sale would have to be run past the IP, who would be paid the balance of your ex-wife's share of the equity, for the benefit of her creditors. If there is any surplus after this it would be passed back to your ex.
Basically your solicitor / conveyancer will liase with the IP to lift the restriction on the conveyancer's undertaking to forward the funds to the IP.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk