National Insurance number
The National Insurance number is used as a reference number in the Pay As You Earn system, and also by the self-employed. It is also used in applications for Individual Savings Accounts (ISAs), to check that an individual has opened only one ISA in a tax year.
Social Fund (UK)
The Social Fund in the UK was a form of welfare benefit provision payable for exceptional or intermittent needs, in addition to regular payments such as Jobseeker's Allowance or Income Support.