Nine of the 14 Reform-controlled councils raised Band D council tax for 2026/27, per The Canary's analysis published 12 May 2026 and an LSE Grantham Research Institute assessment. 1 Eight of the 14 replaced "climate change" or "decarbonisation" in their published planning language with softer terms ("environment", "sustainability", "energy efficiency"). Several of those decisions pre-date the May 2026 election: councils Reform took in earlier rounds were already breaking the tax-cut pledge by the time the 7 May results came in.
The attribution caveat matters. The Canary is a left-leaning UK politics outlet and the LSE Grantham Research Institute is a Westminster-based climate-policy think tank; the council-tax and climate-language analyses derive from their joint reading of council documents, not from a primary-source enumeration. The Reform-led councils have not responded with line-by-line rebuttals. The pattern is consistent with the published budget papers, but individual council audits have not been done.
The statutory hook is the Climate Change Act 2008. The Act places duties on public bodies, including councils, to contribute to net-zero by 2050; removing the language does not remove the duty. Planning officers (not councillors) sign off on the underlying frameworks and remain personally liable for compliance. A judicial review brought against a council whose published planning policy no longer references the Act's terminology turns on whether the substantive duty is being discharged, not on what label sits on the cover sheet. Reform-led councils may discover the legal difference between the cover sheet and the duty.
The pledge-versus-delivery gap also lands inside the MHCLG Section 114 architecture. Thurrock sits at 41 of 49 Reform under continuing MHCLG commissioner control of its £1.5bn Section 114 budget ; the LGA found 22 per cent of social-care councils balanced 2026/27 only on Exceptional Financial Support . Cutting council tax in that environment is mathematically harder than raising it, which is the deliverable-versus-pledge tension nine of the 14 councils have just resolved against the pledge. Reform's 1,448 council seats won the election; the £1.5 billion-class budget environment chose the policy.
