This is only my understanding of your situation but I'm sure if I'm way out Andy or one of the other experts will be along to correct me.
Also as a personal recommendation I dont think you can go far wrong by choosing Melanie Giles. She provides excellent advice on this forum and has successfully helped lots of forum members. I know Melanie is on holday until a week on Monday but if you visit her site
www.melaniegiles.com you can fill out an application form and one of her staff will contact you.
Did any of the comments about your mortgage help? If so it would be worth contacting Tony Parsons as well.
Its often recommended that you should contact more than one IP for advice but contacting Mel will give you an indication of whether an IVA is viable.
Regards
Dave