Hello, my name is Ben and it is my pleasure to assist you with your question today.
If you wish to find out your credit score and where you may have 'black marks' against your name, you would be expected to get a credit rating query with one of the credit reference agencies.
However, be advised that there is no such thing as a universal blacklist and each company will have its own criteria as to what they consider a customer with a good credit score. This essentially means that your circumstances can appear more favourable to one company than they do to another. So the banks you are a customer of can set their own criteria and whilst your circumstances will appear more favourable to one, they may not place you in the same position with the other one.
Anyway, you have the choice of approaching one of the three credit reference agencies to get a report on your credit rating. You can choose between Experian, Equifax and Callcredit. You will have to provide them with certain personal information so that they can identify you and provide you with the correct data about you, but they will keep this confidential. To be honest all the information that you provide them with they will already have on their system so you should not be worried about disclosing it to them in order to get your personal report.
I would be grateful if you could please take a second to leave a positive rating - your question will not close and I can continue providing further advice if necessary. Thank you