National Insurance number
The National Insurance number is a number used in the United Kingdom in the administration of the National Insurance or social security system. It is also used for some purposes in the UK tax system. The number is described by the United Kingdom government as a "personal account number".
Social work
In the United Kingdom, just over half of social workers are employed by local authorities, and many of these are represented by UNISON, the public sector employee union. Smaller numbers are members of the Unite the Union and the GMB (trade union). The British Union of Social Work Employees (BUSWE) has been a section of the Community (trade union) since 2008.