Since the CRB use information supplied by such lay enforcing agencies as the police, any records they have will show up on the check. This can be anything from a few months to even 10 years, depending on the severity of the crime.
Standard Disclosures are primarily for posts that involve working with children or vulnerable adults. Standard Disclosures may also be issued for people entering certain professions, such as members of the legal and accountancy professions. Standard uk.answers.yahoo.com