Looks like you should get you Credit Report ASAP!
Apparently people who have been living at your address should not have influence in your credit rating, UNLESS if you have or have had joint accounts, this information and the other person's data is included in some credit searches. Including information from other people can negatively affect your score if there is derogatory information on their credit report such as defaulted accounts. If you believe that the people listed as associates on your credit report have no active financial link with you, you may complete a Notice of Disassociation.
BUT,
A bankruptcy at your previous address CAN and DOES AFFECT your credit rating! When a bankruptcy order is made, details of the bankrupt are advertised, including addresses at which he currently lives and trades, and previous such addresses. As a result, a bankruptcy order may become associated with an address, and if you live at such an address, you may experience difficulties in obtaining credit. This is because it may be assumed that you are the bankrupt with which the address is associated. However, you have the right to inspect information held by credit reference agencies and have any incorrect information changed.
Get your Credit Report Rating TODAY! My advise would be to get 3 credit reports at once (Experian, Equifax and Callcredit) for about £16 at www.checkmyfile.com . They contain different information in many ways, but you’ll have a full picture about yourself, by getting all of them.