Hi Simon
With regard to the mortgage, you could borrow up to 90% of the value of your property quite easily. Are you at that level now and, if so, what equity do you have remaining?
You are allowed to have credit during an IVA, but only with the express permission of your Supervisor. This is generally only given for very good reasons, such as the purchase of a replacement car or a re-mortgage for the good and benefit of creditors generally.
It is extremely unlikely that creditors will agree to cease charging you interest under an informal debt repayment plan, but of course this is stopped automatically under IVA proceedings.
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