IN Brief:
- UKHSA is consulting contractors before procuring a proposed £1.2bn Tier 1 design-and-build package for Harlow.
- The scope includes medium-containment laboratories, headquarters accommodation, logistics buildings, an energy centre, utilities, and external works.
- A separate procurement will cover the campus’s highly specialised Containment Level 4 laboratory facilities.
The UK Health Security Agency has reopened the route to construction of its national health security and biosecurity campus in Harlow, beginning market engagement ahead of a proposed £1.2bn Tier 1 design-and-build procurement.
Although the procurement excludes the separately managed high-containment laboratory building, its scope remains extensive, encompassing the main science campus, headquarters accommodation, supporting infrastructure, and the systems required to bring several complex facilities into coordinated operation.
Current plans include a new science and headquarters building, Containment Level 2 and 3 laboratories, offices, logistics and support facilities, arrivals and education buildings, an energy centre, roads, parking, utilities, external works, and campus-wide systems integration. Around 2,400 people are expected to work from the Harlow estate once the programme is complete.
Before issuing the formal tender, UKHSA is asking contractors and specialist suppliers to comment on commercial structure, design responsibility, risk allocation, construction sequencing, and supply-chain capacity. An industry engagement event is expected in Harlow on 10 September, with the main competition due to follow later in the year.
Under the current programme, main construction would begin in 2028 and continue into 2038, reflecting both the scale of the estate and the technical standards attached to laboratories that must remain safe, resilient, maintainable, and operationally dependable for decades.
Procurement of the Containment Level 4 facility will proceed separately, allowing the most specialised element to be assessed through a dedicated process. That division also creates a demanding interface between packages that must share utilities, security systems, access arrangements, logistics routes, energy infrastructure, external works, and programme milestones.
Because those interfaces will cut across design, construction, commissioning, and validation, they will need to be fixed well before either contract reaches its most intensive stages. Any ambiguity over responsibility for shared systems could affect programme certainty, while late decisions around containment, resilience, or equipment could force redesign across connected buildings.
The renewed procurement follows an extended review of the Harlow programme after earlier construction arrangements were paused. Kier, Wates, and VolkerFitzpatrick had previously been associated with laboratory, administration, infrastructure, and energy-centre packages before the delivery model was reconsidered.
Restarting the scheme will therefore involve more than issuing a replacement contract notice, because existing surveys, enabling works, design information, technical standards, and earlier procurement decisions must now be reconciled with the revised brief. Bidders will need clarity over which elements remain valid, which require further development, and where liability for inherited information will sit.
Laboratory construction places unusually high demands on building-services coordination, with controlled air movement, pressure regimes, filtration, resilient power, access control, decontamination systems, specialist drainage, alarm integration, and carefully managed routes for people, materials, samples, and waste all forming part of the operating environment.
Rather than being treated as late-stage fit-out packages, those systems must shape the building from the outset. Structural grids, riser capacity, plant space, maintenance access, room adjacencies, and commissioning plans all depend on the scientific operating model, while even a modest change to laboratory equipment can affect several connected services.
Commissioning will carry equal weight, because containment facilities require testing and validation that extends far beyond the normal completion process for an office or conventional public building. Air-tightness, pressure cascades, standby systems, controls, filtration, alarms, and operational procedures must perform together under both normal and failure conditions.
Alongside the laboratories, the energy centre will function as core operational infrastructure rather than a peripheral utility building. Scientific estates carry continuous and often highly concentrated requirements for power, heating, cooling, ventilation, and resilience, so the design must balance security and continuity with efficiency, maintainability, and the government estate’s longer-term carbon obligations.
Demand for this work is increasing across the public sector, where ageing scientific estates and heightened biosecurity requirements are driving investment in secure, technically intensive facilities. Defra has also opened early engagement for a £250m science estates delivery framework supporting laboratory, M&E, civils, utilities, commissioning, and consultancy work at the Animal and Plant Health Agency campus in Weybridge.
As these programmes move forward, competition will intensify for a relatively concentrated group of consultants, subcontractors, and manufacturers able to deliver containment design, clean services, controls, validation, specialist equipment installation, and secure operational integration. Large contractors may be able to manage the overall packages, but the technical supply chain beneath them will determine how much work can proceed in parallel.
The decade-long delivery period introduces another layer of complexity, since regulations, scientific methods, equipment, digital systems, security requirements, and operational expectations will continue to evolve before the estate reaches full readiness. Design teams will need enough flexibility to accommodate change without creating expensive unused capacity or deferring critical decisions until they disrupt construction.
Market engagement gives prospective bidders an opportunity to influence how those risks are distributed. A single Tier 1 appointment could simplify accountability across the main campus, although it would place substantial interface and integration responsibility on one contractor; a divided structure could widen competition and bring specialist capability closer to individual packages, but would demand stronger programme management across contractual boundaries.
The chosen commercial model must provide enough certainty for contractors and specialist suppliers to commit people, design resource, and technical capacity to a programme extending well into the next decade. With the scope now defined and industry consultation under way, procurement structure and interface management will shape how quickly Harlow can return to sustained delivery.
