Decades of mismanagement of nuclear decommissioning in the UK—from inadequate provision for decommissioning costs, to record keeping so negligent as to have left ponds of radioactive waste whose content in unknown—has made the responsibilities of the Nuclear Decommissioning Authority (NDA) some of the most challenging, complex and consequential of any organisation in Britain today. The 108 Delivering nuclear power NDA has made progress in the last five years in simplifying its structure, making more credible estimates of the costs of decommissioning, and replacing complex and opaque subcontractor arrangements with more straightforward ones. The vast annual budget for the NDA—necessarily between £3.5 billion and £4 billion—and the critical importance of its work means that the performance of the NDA must be kept under close review by the Government and Parliament, and that it should have a strong relationship with the Department for Energy Security and Net Zero, the Treasury and the Prime Minister’s office.