
On November 8, 1920, during the Anglo-Irish Treaty negotiations of late 1920 and early 1921, British Prime Minister David Lloyd George proposes the creation of a Boundary Commission to determine the precise border between Northern Ireland and the Irish Free State. This idea is part of a broader set of compromises aimed at resolving the “Irish Question” after the Irish War of Independence.
The Government of Ireland Act 1920 has partitioned Ireland into Northern Ireland (a United Kingdom home rule territory) and Southern Ireland (a separate home rule entity). The 1921 Treaty, signed on December 6, 1921, allows Northern Ireland to opt out of the Irish Free State after a one-month period. On December 6, 1922, the unionist-dominated Parliament of Northern Ireland exercises that right, triggering the formation of the Boundary Commission.
The Treaty’s Article 12 provides for the commission if Northern Ireland chooses to secede. Its role is to review the provisional border set by the 1920 Act, recommend adjustments based on political majorities in border areas and produce a final, legally binding boundary between the Free State and Northern Ireland.
The commission is to be jointly nominated by the United Kingdom, the Irish Free State, and Northern Ireland governments. When Northern Ireland refuses to cooperate, the British government appoints a Belfast Unionist newspaper editor, Joseph R. Fisher, to represent Northern interests.
The commission’s 1924–25 report recommends relatively small territorial transfers in both directions, contrary to nationalist expectations. The findings are leaked in 1925, causing protests from both unionists and nationalists. To avoid further disputes, the three governments agree to suppress the report and instead confirm the existing 1920 border on December 3, 1925, with the border fixed in law.
Lloyd George’s proposal reflects a pragmatic British approach: using a neutral commission to manage the sensitive issue of partition and prevent further conflict. While the commission’s recommendations are not implemented, the process helps formalize the border that remains in place until the 1960s, shaping the political and sectarian divide in Ireland for decades.








