There is a possibility that after I have gone bankrupt that I may earn extra income in the form of commission. I understand that the OR can set up some sort of payment order/agreement. Is this money taken at source from my employers?
No, I don't believe it's taken at source. I think the IPA (if you're eligible to pay one) is taken as a direct debit each month. I don't have one yet, but I think that's how it works.