Source: https://tendernation.io/opportunities/01a13ca0-bdb2-711e-bc91-302278531c4c/the-battle-of-britain-bunker-phase-2-water-mitigation-works awarded GB open procedure Suitable for SMEs # The Battle of Britain Bunker: (Phase 2) Water Mitigation Works [London Borough of Hillingdon](https://tendernation.io/buyers/london-borough-of-hillingdon) Estimated value £900,000 Published 22 Aug 2023 Deadline Closed 21 Nov 2022 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Open procedure Anyone can submit a full tender; there is no shortlisting stage. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender ### Award Notice The Battle of Britain Bunker was constructed in 1938 as the underground operations room replacing a ground level facility. In 1940 it was the nerve centre for directing the fighter protection over London and the Southeast. The Bunker was built on two levels, and remains largely unchanged, it contains its original air filtration system provided by two independent plant rooms, mains and standby power supplies, together with telephone exchanges and offices. It was closed for operational use in 1958. The bunker is now a museum. Phase 2 Water mitigation is part of an ongoing programme of works being carried-out at the Bunker complex. This phase consists of drainage, repairs and internal works. Drainage works: The works is for a series of land drains and Swales across the site to intercept water away from the complex. And the creation of a new below ground attenuation tank to mitigate off-site drainage along with decommissioning of an attenuation pond, and all associated works. Repairs works: The repair work is to three leaking air shafts that involves deep excavation and cutting through two burster courses, asphalt repairs and formation of a concrete outer sleeve. Other works are to be carried-out as specified. Internal works: Internal works are to consist of plant room and ventilation ductwork repairs, electrical upgrade, and water management improvements. ### Programme Construction works: End January 2023 - End August 2023 \*\*\*\*Please register/log in at [capitalesourcing.com](https://www.capitalesourcing.com) to view all tender information/documents\*\*\*\* Additional information: The London Borough of Hillingdon is inviting all interested organisations to tender through the Council's nominated electronic tendering portal, [capitalesourcing.com](https://www.capitalesourcing.com) Please register on the above portal where the tender documents for this project can be downloaded. Read full description ## CPV classification Ground-drainage work Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/6abd503c-2e8d-46df-aa82-656183fd6aff) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile London Borough of Hillingdon: past awards and live tenders](https://tendernation.io/buyers/london-borough-of-hillingdon) [Sector More Construction work tenders](https://tendernation.io/sectors/construction-work) ## More tenders like this [Bannister Sports Centre Athletic Track Soft Market Testing Exercise · Harrow Council · 38 days left · 26 Nov 2026](https://tendernation.io/opportunities/01a1540d-d9e4-71cb-ad57-1603e9042fec/bannister-sports-centre-athletic-track-soft-market-testing-exercise) [Building construction work – Budowa budynku mieszkalnego wielorodzinnego wraz z infrastrukturą techniczną w miejscowości Szczucin · KZN SIM Tarnów Sp. z o.o. · 7 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-d859-7328-9ee6-a304ce645326/poland-building-construction-work-budowa-budynku-mieszkalnego-wielorodzinneg) [Floor-covering work – Universität Leipzig, Leuschnerplatz, Global Hub, Forschungsneubau · Staatsbetrieb Sächsisches Immobilien- und Baumanagement, Zentrale, Zentralstelle Vergabe- und Vertragsmanagement · 3 days left · 22 Oct 2026](https://tendernation.io/opportunities/01a156a9-acfc-73ee-baab-9e699f88521a/germany-floor-covering-work-universitat-leipzig-leuschnerplatz-global-hub) [Demolition work – Rück- und Neubau Lichthochmaste · Hamburg Verkehrsanlagen GmbH · 7 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-6ef0-7276-94e2-d5fa0cb2d6c7/germany-demolition-work-ruck-und-neubau-lichthochmaste) [Plastering work – Modernisierung und Erweiterung Matthias-Claudius-Heim Würzburg · Diakonisches Werk Würzburg e.V. · 1 day left · 20 Oct 2026](https://tendernation.io/opportunities/01a156a9-e605-706f-8937-7f0ba18339c0/germany-plastering-work-modernisierung-und-erweiterung-matthias-claudius-hei) [Heating plant construction work – Petrašiūnų elektrinės elektrifikacija, įrengiant elektros energijos kaupimo įrenginius, dyzelinį generatorių ir rekonstruojant 6 kV skirstyklą (projektavimas ir rangos darbai) · Akcinė bendrovė „Kauno energija“ (PV) · 7 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-6f1d-727f-a077-bc25dec93b92/lithuania-heating-plant-construction-work-petrasiunu-elektrines-elektrifikac)