HMP Millsike is the first prison in the UK to run solely on electricity. The MoJ expects that the use of solar panels and heat pumps will save £1m a year. The build is a Category C prison which has created 1,468 new places for category C prisoners. Constructed by Kier Construction, the site includes six Houseblocks, a Care and Segregation Unit, an Entrance Resource Hub, a Support Building, various Workshops, Kitchens and a Central Services Unit housing health, education and faith areas. Following a period of operator preparation, the first prisoners will arrive in spring 2025.