Your credit report will show a variety of different things. Your personal information such as your name, date of birth, current and previous addresses and any people you are financially linked to. They will also show a breakdown of your credit accounts. This will include the name of the creditor, the balance, payment history and current status of the accounts.
Public records, such as County Court Judgments or bankruptcies would also be shown. Any credit searches that have been carried out would also be shown.
Different information may be help by the three credit reference agencies as not all creditors report to all three agencies.