National Security Investment

Wes Streeting Excerpts

Thursday 17th July 2025 Written Statements

[The Secretary of State for Health and Social Care (Wes Streeting)]

I am today confirming that the Government will proceed with the construction of a new, state-of-the-art health security campus—including new high containment laboratory facilities—in Harlow, Essex. This site will replace the UK Health Security Agency’s (UKHSA) existing facilities in Colindale and Porton Down and will form part of the Government’s network of national biosecurity centres as announced in the national security strategy. This decision reflects the hard work and extensive campaigning by the hon. Member for Harlow and is a vote of confidence in Harlow’s potential.

This facility represents the most significant investment of its kind in a generation. The programme is a multi-billion-pound investment, with £250 million to be spent over this Parliament to kickstart delivery of the new facility. It will consolidate, into a single purpose-built site, the critical high-containment laboratory functions as well as the existing research and diagnostic functions of our existing facilities in one location and will also serve as UKHSA’s corporate headquarters.

The new Harlow site will strengthen the UK’s pandemic preparedness, reinforce national security, and provide world-leading capability to detect, assess and respond to health hazards.

In addition to the public health benefits, this development will support economic growth and create an estimated 1,600 additional high-skilled jobs. It will enable closer collaboration between leading scientists and the life sciences sector. The Harlow site offers strategic opportunities for new partnerships and scientific innovation and will further enhance the Oxford–Cambridge corridor as a major engine of national prosperity.

UKHSA will finalise the design of the Harlow site before construction begins, with phased occupation of the facility starting in the mid-2030s. The site will be fully operational by 2038. A period of dual running with existing sites will ensure a safe and effective transition of operations. UKHSA will maintain operations at Colindale and Porton Down until Harlow is fully validated and operational.

This decision will affect approximately 1,650 UKHSA staff across the Colindale and Porton Down sites and staff at its headquarters in Canary Wharf. UKHSA will work closely with affected staff throughout the transition period, recognising the unique and vital expertise of its workforce.

The Defence Science and Technology Laboratory (Dstl) site at Porton Down is not affected by this decision and will remain in operation on its existing site.

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