A review was commissioned by the Chief Medical Officer of England and Wales owing to increasing concern about the ways in which patient information is used in the NHS of England and Wales and the need to ensure that confidentiality is not undermined. Such concern was largely due to the development of information technology in the service, and its capacity to disseminate information about patients rapidly and extensively. In 1996, guidance on "the protection and use of patient information" was promulgated and there was a need to promote awareness of it at all levels in the NHS. It did not affect Scotland originally but they have recently adopted it. A main committee was set up under Caldicott's Chair and there were four separate working groups; the committee was known as the Caldicott Committee.