The Carbon Reckoning campaign addresses two key issues:
The Science Problem
The Government's budget is benchmarked against a remaining global carbon budget calculated years ago. Scientists have since revised that figure significantly downward. The Climate Change Act 2008 requires budgets to reflect "significant developments in scientific knowledge." The proposed budget does not, and the UK therefore takes more than its fair share.
The new legal dimension
In July 2025, the International Court of Justice delivered a unanimous Advisory Opinion: states bear obligations of "highest possible ambition" to align mitigation measures with the 1.5°C limit (which we are passing this decade in any case). Developed countries like the UK carry heightened responsibilities under the equity principles of the Paris Agreement. The UK's proposed budget has not been assessed against either standard since the opinion.
Parliament is watching
Following submissions from scientists and Carbon Reckoning, the cross-party Environmental Audit Committee formally recommended the Government set out how the Seventh Carbon Budget aligns with the science and the Paris agreement. Carbon Reckoning now aim to ensure that this genuinely happens.
Carbon Reckoning
Carbon Reckoning is building a forensic legal challenge under the Climate Change Act to formally write to Government — setting out the failures and requiring them to be addressed — before the budget is fixed in law.
This is distinct from, but complementary to, other recent climate litigation such as the two successful cases on the UK Climate plans: it focuses specifically on the adequacy of the overall budget level against current science and the ICJ Advisory Opinion, whereas those cases were on the adequacy of the policies, and its risk management, used to deliver it.
The window is short now. As awareness increases daily of the planetary and national emergency we are in, this case aims to put official climate policy and decision making under greater scrutiny against the science and international law. This matters too because the Government's statutory obligations should be enforced.
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All the best, Andrew
for Carbon Reckoning (Andrew, James, Rebecca and Simon)