The Brink Case Dadatabase is classified UK TOP SECRET with code name K56D.

Routine services and operations not subject to a heightened threat level, if lost, stolen or published could have damaging consequences.

Heightened protective measures on sensitive information to defend against a determined and highly capable threat, where compromise could seriously damage the investigation of serious crime.

The highest levels of protection from serious threats, where compromise could cause widespread loss of life or else threaten the security or economic wellbeing of the country.