Time and Bronte, thanks for your comments.
Am I following the line of thought that if the bank are owed 500K, even if a instalment order is applied fork, then 12 years, say at 500K per month, after 12 years, the balance of the debt dies also. What ever has been paid has been paid. Or can they still take your family home or apply a judgement mortgage on the equity in the home at this point, or apply for another instalment order. If so there is a middle ground between bankruptcy and slavery for life.
The context in which I ask this is I am 500K in negative equity on a bad property investment, 100K in negative equity on my home. Rather than go bankrupt, I would rather commit to paying a monthly amount for the next 12 years on the investments and pay my house off over the next 30 years. However, if I will never get out of debt of face losing my home in the later years of my life I would rather take the pain now.