Think I may have found my answer through the haystack that is Google - seems that even if it was possible, finding a lender to accept an application would be pretty difficult!
Yes, finding a lender would be difficult ... more so a lender without eye watering rates. However, the stumbling block would be your IP as there should be a restriction on your title deeds which would alter him and deter a lender. If you could extend your secured lending you would be expected to be doing this to release equity towards the end of the IVA in any case and your F&F offer at this stage would need to factor in an amount in that regard.
That all said, I believe that The Select Partnership have assisted homeowners in such endeavours in the past. However, some creditors are resistant, on principle, to early closure using borrowed funds.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014