The Commonwealth of Britain Bill was a bill first introduced in the House of Commons in 1991 by Tony Benn,[1] then a Labour Member of Parliament (MP).

It was seconded by the future Leader of the Labour Party, Jeremy Corbyn.

The Bill proposed abolishing the British monarchy, with the United Kingdom becoming a "democratic, federal and secular Commonwealth of Britain", or in effect a republic with a codified constitution.

It was introduced by Benn a number of times until Benn's retirement in 2001, but never achieved a second reading.

Under the Bill: