Hi Simon
So sorry you are having such problems when youre obviously trying so hard.
You could try to reduce your payments on the IVA, things change and 5 years is a long time, they may be able to help you through it with reduced payments.
If you cannot maintain it all and know for sure its not going to work then BR is really the next step. I dont know of any legal implications, I am not a professional expert, just another person dealing with debt. BR is a quite straightforward way of dealing with debt, its daunting but not as bad as many people think its going to be. Any assets over 3K in value may be lost, you pay rent so I am assuming you do not have a property. If you have a surplus of £100 after your income and expenditure figures, you may have to pay into an IPA for 3 years. The allowances are higher than they are in an IVA.
You really need to speak to your IP, or email your IP directly, detailing your problems first and foremost, you can find details at
www.insolvency.gov.uk.
I hope this helps.