§ Mr. Clappison
To ask the Secretary of State for Work and Pensions how many surplus national insurance numbers have been removed from his Department's Central Index since 1997; and what plans he has to tackle the problem of bogus and surplus numbers. 
§ Malcolm Wicks
The Departmental Central Index (DCI) Data Cleaning Project removed 100,000 surplus duplicate National Insurance numbers (NINOs) from the DCI between April 1997 and March 2001.700W
To prevent the creation of further bogus and duplicate NINOs, the Enhanced NINO allocation process was introduced nationally from April 2001.