The Anglo-Irish Treaty, which resulted in independence for what was initially known as the Irish Free State, was signed 100 years ago today. David Torrance outlines how MPs and peers reacted when asked to approve the treaty at a specially convened parliament later that month.  

Despite its significance to the history of the United Kingdom, the Anglo-Irish Treaty – signed a century ago on 6 December 1921 – has had remarkably little attention from historians and constitutional scholars.

Especially neglected has been the UK Parliament’s consideration of that treaty, in marked contrast to considerable analysis of the Dáil debates during December 1921 and January 1922. In accordance with Article 18 of the treaty, its provisions required approval by both the UK Parliament and ‘a meeting’ of those elected to the (devolved) Parliament of Southern Ireland in May 1921.

Parliament was convened on 14 December 1921 for the sole purpose of considering the treaty. King George V said in his speech opening parliament that it was his:

earnest hope that by the Articles of Agreement now submitted to you the strife of centuries may be ended and that Ireland, as a free partner in the Commonwealth of Nations forming the British Empire, will secure the fulfilment of her national ideals.

Both Houses of Parliament were instructed to make a humble address by way of reply to the King’s Speech. This was unusual – Sir Austen Chamberlain later explained that this means of ratification was ‘founded […] on a precedent which had prevailed uninterruptedly up to the year 1890’ – but then the treaty itself was unusual in that it had been agreed between two parts of the UK rather than two (internationally recognised) sovereign states.