Who served as the most recent Labour Party Prime Minister before 2010?

The correct response is significant as it relates directly to the timeline of the Labour Party leadership in the UK. Gordon Brown served as the Prime Minister from June 2007 until May 2010. He succeeded Tony Blair and remained in office until the Labour Party lost the general election in 2010.

Understanding the historical context is crucial, as the other figures mentioned hold notable positions within the Labour Party but did not serve as Prime Minister immediately prior to 2010. Harold Wilson served two non-consecutive terms, the most recent of which ended in 1976. Ramsay MacDonald served as Prime Minister in the 1920s and again in the early 1930s. Clement Attlee was Prime Minister following World War II until 1951. Thus, recognizing Gordon Brown's role as the last Labour Prime Minister before 2010 accurately reflects the continuity of Labour leadership and the political landscape during that period.