Hi Ray
I shall caveat my reply firstly on the basis that I do not have the full facts of your case in front of me, and that I am just one of the forum experst. Others may have differing views.
However, and based upon the information you have supplied, it appears that there is a dispute over whether statutory interest is payable or not - and that your own solicitor has intimated that the clause may be unenforcable.
Firstly, I would not run the risk of losing your buyer, if you have plans to move into rented accomodation. Your dispute with your IP relates to money and not the asset, therefore you could sell the property and agree to put the disputed sum of the sale proceeds into a separate account - or ask your solicitor to keep them in a client account - pending this matter being resolved. This ought to satisfy your Supervisor.
Once the issue over the statutory interest clause is resolved, and if this goes against you, then you could ask the Supervisor to call a variation meeting of creditors to see if they are prepared to waive their right to receive the interest - and I think that you have a good chance of achieving this given the circumstances you have described. The supervisor will incur additional costs in preparing an appropriate report, and of course will want those to be paid.
Personally I would not threaten a report to his regulatory body - as I am not sure what grounds you have and this is not likely to assist with an attempt at amicable settlement. Why not try and arrange a face to face meeting with the IP to see if you can resolve things on an amicable basis. I am sure that you will get the result you are looking for, and don't forget to keep posting with your news.
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