You will need to speak to your IP to see what happens.
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
Just a thought -- reading about your hopes of closing early on another post --- the 50% of the pay rise you are allowed to keep can be set aside to make a full and final offer ( based on remaining payments) in the future. Normally you cannot make such an offer from your own money, but it would be acceptable to use your 'share' of extra income.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk