The National Insurance Act 1946 (9 & 10 Geo 6 c. 67) was a British Act of Parliament passed during the Attlee ministry which established a comprehensive system of social security throughout the United Kingdom.

The act meant that all who were of working age were to pay a weekly contribution.

When elected, he and his administration and adopted Beveridge proposal from 1944 to keep to his manifesto promise.

[1] According to the historian Kenneth O. Morgan, the Act constituted "a measure which provided a comprehensive universal basis for insurance provision that had hitherto been unknown".

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