I believe other posters have done so, but you have to keep your IP in the loop as you still need their agreement as, although the loans are not repayable during the life of the IVA, they are still further borrowing.
This is something I would run by the IVA provider before you sign up and get the answer in writing.
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