Opposition Day: Sewage: Lib Dem motion

What happened: On 23 April 2025, the House of Commons voted on a Liberal Democrat motion calling for immediate and comprehensive action to tackle sewage pollution in rivers and coastal waters. The motion was defeated by 302 votes to 77. The Liberal Democrats used an Opposition Day (a parliamentary session reserved for parties other than the government to set the agenda) to press for stronger measures against water companies and sewage discharges.

Why it matters: The vote concerned one of the most politically contentious environmental issues in Britain: the routine discharge of raw or partially treated sewage into rivers, lakes, and coastal waters by water companies. The Liberal Democrat motion demanded action beyond what the government had already committed to. Had it passed, it would have put pressure on ministers to go further than the recently enacted Water (Special Measures) Act and the government's own amendment, which was passed separately on the same day. The outcome leaves the government's existing framework in place, without the additional requirements the Liberal Democrats sought.

The politics: The Liberal Democrats were joined by Plaid Cymru, the Greens, three independents, and one MP each from Reform UK and the Democratic Unionist Party, totalling 77 votes in favour. Labour and Labour and Co-operative MPs voted unanimously against, providing the 302 noes that defeated the motion. The Conservatives, despite being in opposition, were entirely absent from this division, neither supporting the Liberal Democrat push nor the government's alternative. The vote followed a pattern established during earlier stages of the Water (Special Measures) Bill, where the government consistently defeated opposition amendments seeking more stringent measures.