Hi Oddjob and welcome to the forum. Glad that you are finding it useful.
You will need to discuss a potential house sale with First Plus, but you are right to assume that their shortfall will become an unsecured debt in any subsequent insolvency. If you decide to go down this route, make sure that you keep First Plus in the loop as they are unlikely to be keen to become an unsecured creditor.
Your suggested way forward barely scrapes a minimum dividend of 25p in the £, after costs, and assumes that your house will sell at the asking price. If you are obliged to reduce the price, this will create a larger First Plus debt.
How have you been managing to make your creditor repayments of late - has this been by taking out additional borrowings?
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk