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 Fund (UK)
The Social Fund (UK) should not be confused with social funds in developing countries (sometimes also called Social Investment Fund, Social Fund for Development, Social Action Fund, National Solidarity Fund or Social Development Agency), or with the European Social Fund.