The government's multi-year Spending Review is in full swing, due to be completed in the late Spring. During this time, the Treasury has to make difficult decisions about how to allocate the country's limited financial resources.
There will - we understand - be no Sizewell C Final Investment Decision until the review is completed, and the Chancellor is under a lot of pressure over the stuttering economy.
With the project now reported to be costing at least £40 billion (Financial Times), Rachel Reeves should cancel Sizewell C now.