HMP Millsike – New Prisons team
HMP Millsike, the UK’s first all-electric prison, was delivered on time and under budget, creating 1,500 new prison places and supporting the government’s plan to add 14,000 places by 2031. At a crucial time for prison capacity, this achievement demonstrates exceptional project delivery and societal impact.
The team navigated challenging ground conditions, including a high water table, underground obstructions, and 50 kilometres of ducting, while ensuring readiness for the first prisoner. Close collaboration with utilities providers, contractors, and the newly appointed operator Mitie ensured a seamless mobilisation, with around 5,000 actions across 17 workstreams completed and around 600 staff recruited.
HMP Millsike sets new environmental standards as the greenest prison in the estate, achieving a BREEAM ‘Excellent’ rating, 10% biodiversity net gain, and using 68% less energy than comparable new builds- incorporating green technology including over 1,800 solar panels.
The project exceeded local employment and social impact targets, generating around 800 jobs during construction, including 73 held by ex-offenders or prisoners on temporary licence, and injecting over £150 million into the local economy. HMP Millsike exemplifies cross-project collaboration, innovation, and public value, delivering a secure, sustainable, and timely solution that strengthens public safety.