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".
Universal Credit
Universal Credit is a United Kingdom social security payment that is intended to simplify working-age benefits and to incentivise paid work. It is replacing and combining six means-tested benefits: income-based Employment and Support Allowance, income-based Jobseeker's Allowance, and Income Support; Housing Benefit; and Working Tax Credit and Child Tax Credit.