Ace the UK Citizenship Test 2025 – Unlock Your British Adventure!

The leader of the Labour Party who established a Scottish Parliament and a Welsh Assembly is Tony Blair. His tenure as Prime Minister began in 1997, and during this time, he implemented a significant constitutional reform agenda aimed at decentralizing power in the United Kingdom. This included the introduction of devolution, which allowed Scotland and Wales to have their own legislative bodies with varying degrees of power. The Scottish Parliament was established in 1999, followed by the creation of the National Assembly for Wales. These reforms were pivotal in giving greater autonomy and governance to these regions, marking a significant shift in the political landscape of the UK under Blair's leadership.

The other figures listed, while important in their own rights, did not initiate these specific reforms. David Cameron served as Prime Minister after Blair, Ed Miliband was the leader of the Labour Party but not during the establishment of these institutions, and Gordon Brown, while also a Labour leader and Prime Minister, continued Blair's policies without being the architect of the original devolution initiatives.