Standard and Enhanced Disclosures of the CRB will contain information held on the Police National Computer (PNC).
A PNC record will have be created for persons including those who:
� Are the subject of judicial process for recordable offences including information about their current status;
� Have previous convictions for recordable offences (including reprimands, warnings and cautions);
� Are currently disqualified from driving;
� Are wanted by the police;
� Have been arrested and fingerprints or DNA samples have been taken;
� Are missing or have otherwise come to notice.
Certain information held on the PNC will be 'stepped down' after specific time periods. This stepped down information will not appear on the subject's Standard Disclosure.
An Enhanced Disclosure may include the stepped down information if it is deemed relevant and may include additional information held by local police forces which does not appear on the PNC.
http://www.crb.gov.uk/default.aspx?page=1871
How long does a does a police caution stay on file?
As per the
2006 Retention Guidelines, all PNC records are retained for police use until the subject attains the age of 100 years.
For adult cautions the step down will occur after a 'clear period', i.e. the subject does not come to any further notice by the police, and is dependent on the category of offence:
� Serious offences and potentially dangerous people i.e. those deemed to pose the highest possible risk to the public - 10 years
� Other sexual and violent offences - 5 years
� All other non-violent, non-sexual offences - 5 years