I don't think there is a specific percentage - they will be the same as the others and look at affordability.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
My meeting was Monday just gone and Northen rock are one of mine.
I believe they do not have a 'requested' amount that they want, but may ask for a modification in the arrangement. Mine was an increase of £12 to my amount and an extension of 12 months.
You could speak to your IP and ask.
Started IVA 27th Feb 2012 - Due to complete 27th Jan 2018 !!
Full & Final submitted and accepted 30th March 2015, paid 10th April 2015 - 3 yrs 1 month into IVA
Completion Certificate received- 30th April 2015!!
They have no minimum dividend requirement and do not always ask for the IVA to be extended to six years - only if there is more than six years left to pay on their loan.