You could be made bankrupt or possibly worse the IVA would be failed. This puts you back to square one and any money paid into the IVA would be lost. If however, the missed payments were sanctioned by your IP due to sickness etc the IVA may be extended to achieve the original dividend.
If you own your own property then the creditors WILL have a restriction on the property.
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