Hi doingitagain71
Given that you were discharged in 2006, the record of your bankrutcy will not come off your credit file until 2012 (6 years after i was added). As such, I think you may find it difficult to get a credit card at this stage. Why not have a chat to Co-Op as you are banking with them and they can see your banking record over the past few years which might help. If they refuse you can always ask them what criteria you will need to meet to be accepted in the future.
Andy makes a good suggestion about a pre-paid card. If you get a pre-paid Visa card, you will have to pay for it but at least it will give you the back up card you require for emergencies