Andy Burnham says he would replace the UK’s first-past-the-post voting system with proportional representation. In making the pledge, he argues the change would broaden representation in Parliament and make it possible for smaller parties to play a role in government. The coverage links the proposal to the idea that parties outside the traditional main parties would be more likely to win seats and therefore participate in governing arrangements. The articles cite the types of smaller parties that could benefit from proportional representation, including parties such as the Greens, the Liberal Democrats and Reform UK. The sources frame the commitment as a way to enable smaller parties to be included in government rather than leaving them primarily without parliamentary influence under the current electoral system. No additional policy details, implementation timetable, or specific proportional representation model are stated in the provided material.