This will not work ackeryi.
It may be possible to negotiate with MBNA outside of a proposed agreement, if you have a lump sum offer - based on cash being immediately available - and are paying them less or equal to what is on offer to creditors within the IVA. In which case, the other creditors will benefit from the MBNA saving, but so long as you make MBNA aware that a higher or similar offer might be made which they could benefit from then that is for them to consider.
Go 4 broke is right - MBNA are only owed 15% of your overall debt. Your IP could therefore work hard to pull in sufficient votes to outvote their certain rejection.
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