Hi Craig and welcome to the forum.
An iva covers all unsecured debt, that includes overdrafts and credit cards, loans. Not anything that is secured against an asset such as a house.
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
Your CCJs will definately be included in your IVA proposal, but you should continue to make any payments into Court until this has been accepted by creditors.