You can get the IP to remove the restriction. A purchaser will not proceed with it on the title.
If I were in your shoes and want out of the house I would approach my IP with an offer along the lines of, "I am willing to sell the property on the proviso that the creditors accept £xxx ( slightly more than they would be getting if the IVA were to run) in full and final settlement from the proceeds".
Give the impression that if they did not accept you would not sell and the IVA would run it's natural course, and the creditors would get less.
This would ensure that, depending on the actual figures, you get a chunk for ongoing accommodation expenses as well as ending the IVA.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014
Put forward a variation offer to sell the house on the basis they will receive an amount equal to the next 2 years contributions and you keep the balance.
Does the 2 years include the 12 month assumed extension for the equity? If not you will likely have 3 years remaining, not 2.
Also consider that the IVA gave you the opportunity to keep you house. You will find it very difficult to get back on the property ladder once it is sold.
If you finish your IVA early you will still not be able to tidy up your credit rating until the 6 year anniversary from the start of your IVA has passed.