Opposition Day: Tax

What happened: On 15 July 2025, the House of Commons voted on a Conservative opposition day motion on taxation policy. The motion was defeated by 342 votes to 165. Opposition day motions are set aside for parties other than the government to choose the topic of debate, and in this case the Conservatives used their allocated time to bring a motion criticising Labour's approach to tax or proposing an alternative.

Why it matters: Although opposition day motions are not legally binding and do not change government policy if defeated, they serve as a formal parliamentary expression of the opposition's position on a major policy area. In this case, the motion concerned taxation, one of the most consequential areas of domestic policy, affecting businesses, workers, and households across the country. The defeat means the government's tax approach continues without parliamentary endorsement of an alternative.

The politics: The vote divided largely along party lines. Labour and Labour and Co-operative MPs voted unanimously against the motion, providing the bulk of the 342 no votes. On the aye side, Conservatives were joined by the Liberal Democrats, who contributed 61 votes, as well as the Democratic Unionist Party with 5, Reform UK with 4, and a small number of independents. The Greens voted with the government against the motion. The cross-opposition alliance in favour of the motion was not sufficient to overcome the government's majority.