Nuclear electricity is a predictable and low-carbon part of the UK energy mix, currently providing 15% of the UK’s electricity. However, most existing nuclear power stations are set to close by 2030. The Government has an ambition to increase production of nuclear energy. One new nuclear power station is under construction (Hinkley Point C) and another (Sizewell C) has received planning consent. This POSTnote reviews the evidence surrounding the construction of new nuclear power stations and the ways in which nuclear might contribute to emission reduction targets.