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.
Supplemental Security Income
Aged – Being deemed aged consists of attaining the age of 65 or older. The Social Security Administration, like the United States Government in general, follows English common law and considers a person to attain an age the day before their birthday.