IN Brief:
- The Bank of England has named Sir Robert McAlpine for its £133m Threadneedle Street main works contract.
- The four-year programme covers core services, workplace floors, the ground floor, auditorium and basements in a functioning secure estate.
- The Bank will define and approve individual work sections before they can proceed.
Sir Robert McAlpine has been selected as main contractor for the Bank of England’s £133m Location Strategy main works programme at Threadneedle Street in the City of London, involving the consolidation and refurbishment of a complex, operational headquarters. The award was published on 26 October 2026 and establishes a proposed four-year route for delivery, subject to the contract and individual works instructions. The Bank is seeking to renew core infrastructure and adapt occupied areas without treating its historic estate as a cleared development site.
The scope listed in the contract award covers general and section-specific preconstruction services, preparatory work, replacement of core infrastructure, the ground floor, auditorium, workplace floors and basement areas. Each part has its own design, access and sequencing requirements. The sections are not fixed construction packages that can all be started immediately: their detailed content will be developed during preconstruction and the Bank must issue a separate notice to proceed before each one begins.
The £133m figure is the published contract award value, while the Bank retains discretion over the timing and content of individual sections. It may refine, enlarge, reduce or omit a section before issuing its instruction. The staged mechanism separates the appointment of a main contractor from authority to start every element of the programme. As design information and building surveys become more detailed, the contractor will have to coordinate instructed work with sections still in preconstruction, including any services shared across the boundaries.
The Threadneedle Street headquarters is intended to remain operational during the refurbishment. Site boundaries, deliveries, temporary services and circulation routes therefore have to be planned around continuing occupation and stringent security controls. Isolating plant serving one work area can affect another, and structural openings or intrusive investigations may require separate access arrangements. The published award does not fix the logistics plan or the order in which occupied floors will be released to the contractor.
Core infrastructure replacement will depend on surveys of existing systems and the routes through which they serve occupied accommodation. Mechanical, electrical and communications services can extend between plant spaces, basements and workplace floors; a phased replacement needs clearly defined isolation points, temporary supplies where required and commissioning boundaries. These are normal technical interfaces for an operational refurbishment, rather than confirmed equipment specifications. The procurement record does not identify the plant items, capacities or temporary arrangements selected for Threadneedle Street.
The historic fabric introduces further constraints where service routes, fixings and intrusive investigations cross retained structures or finishes. Parts of the estate have reportedly undergone little substantial renewal since 1942, increasing the prospect that opening-up works will reveal conditions not evident in existing records. The Bank’s sectional instruction process allows design and scope to respond to what those investigations establish, without presuming that identical interventions will work across different areas of the headquarters.
Ground-floor and auditorium works also introduce distinct patterns of use and access. Public-facing or event-related facilities cannot automatically follow the same closure and commissioning plan as ordinary workplace accommodation. Basement works, meanwhile, must be coordinated with the services and structures above them. The contract notice identifies these work areas but does not state what physical alterations have been approved for each, leaving the detailed intervention programme to later design and instruction stages.
The competition attracted four tenders, with three contractors assessed in the final stage, according to contemporary construction reporting. An earlier procurement estimate was approximately £142m, compared with the eventual £133m award. The difference should not be treated as a quantified saving: the notice allows the scope of individual sections to change. Industry reporting places formal contract signing in late November, while the published initial term extends to November 2030 and includes the possibility of a further year.
The immediate work is to develop section-specific designs, survey requirements, interfaces and detailed scopes before each instruction is issued. The ground floor, auditorium, basement and workplace areas will have different access and service dependencies, even where they share the same contractor. A change in one section could affect temporary works or commissioning elsewhere in the estate. Coordination of interfaces between new and existing services will remain necessary even after an individual section has been handed back into use. Sir Robert McAlpine’s award establishes the principal delivery route, but the actual construction sequence and extent of each phase will be determined through the Bank’s subsequent approvals.
