a bad address cannot mean future problems unless you either have a financial link to the person who has had problems (eg joint bills) or you have the same name as that person.
The major credit companies are actually
Http://www.equifax.co.uk
http://www.experian.co.uk
http://www.callcredit.co.uk
CNN is actually a news company which is American based.
You should get in touch with the above companies and get a copy of your credit report if you are in any doubt. Just get a basic copy (�2.00) rather than the expensive ones.
Another tip is to make sure you go on Voters Role. This will help you get credit in future.