Bristol Beacon refurbishment, Bristol, UK

The £132 million transformation of Bristol Beacon - the grade II listed 1867 concert hall formerly known as Colston Hall - was completed to the agreed revised schedule and budget in November 2023, winning Retrofit Project of the Year at the 2024 British Construction Industry Awards. Delivered under an NEC3 Engineering and Construction Contract (ECC) Option A (priced contract with activity schedule) by Willmott Dixon for Bristol City Council, the project demonstrates NEC's capacity to support a contract reset mid-delivery, rebuild a strained client-contractor relationship, and bring one of Europe's most complex heritage refurbishments to a successful conclusion through daily early warnings and intensive collaborative risk management.                   

One of Europe's most complex heritage refurbishments

Bristol Beacon had been altered continuously across its 150-year life, with a new foyer and small hall added in 1873, the main hall rebuilt after major fires in 1898 and 1945, and a modern three-storey frontage added in 2009. When the venue closed for refurbishment in 2018, the full extent of the challenges hidden in the fabric of the building was not known. After demolition of the main roof and interior, a 120-tonne bird-cage scaffold was installed to support the unstable external walls. Around 1,000 tonnes of concrete was then poured to strengthen foundations that included two levels of disused cellars, alongside uncharted wells, unexpected asbestos and missing structural elements not identified during the pre-contract surveys.

The completed building provides a 2,124-capacity main hall, 500-capacity small hall, 250-capacity cellar venue and 110-seat restaurant across 8,400 m² over eight floors. It achieved a BREEAM 'very good' rating, with 127 kW of rooftop photovoltaic panels reducing carbon dioxide emissions by 54 per cent. Phil Gibby of Arts Council England, which provided £22 million of funding, said the refurbishment cements the Beacon as one of Europe's flagship venues.

Resetting the contract and rebuilding the relationship

The scale of what lay beneath the surface drove costs and delays well beyond the original programme. In April 2021, following the appointment of Arcadis as strategic delivery partner to Bristol City Council, the contract was reset through a deed of variation. Design responsibility for the existing structure transferred to the client, limiting the contractor to new works only, and Arcadis took over as NEC project manager. John Betty, the client's project director from Hammonds PMS, says the NEC framework was central to making the reset work. 'NEC set the scene for building and then rebuilding a solid, respectful and collaborative relationship between the client, the contractor and the supply chain. This fully came into play once we had reset and de-risked the contract in 2021.'

After the reset, the frequency of early warning and risk-reduction meetings was increased to at least daily. Over 800 compensation events had been notified in the first two years alone. With daily meetings in place, the team maintained the discipline to identify and mitigate risks at the earliest possible opportunity for the remainder of the project. Despite further setbacks - including Covid-19, supply shortages and high inflation - the hard opening date of November 2023 was achieved, test events began two months early, and the final account was settled at completion. The 2024 BCIA judges said they were particularly impressed with the collaborative approach and agility adopted by the team throughout.

NEC set the scene for building and then rebuilding a solid, respectful and collaborative relationship between the client, the contractor and the supply chain. Thanks to everyone working together to achieve this common objective, we were able to start running test events two months before the hard opening date.

John Betty, Project Director, Hammonds PMS

Benefits of using NEC

• NEC's flexibility allowed the contract to be reset mid-delivery through a deed of variation, redistributing design responsibility between client and contractor when the full complexity of the existing structure became clear - a critical intervention that kept the project alive.
• The NEC requirement to act in a 'spirit of mutual trust and co-operation' provided the foundation for rebuilding the client-contractor relationship after the 2021 reset, enabling both parties to work towards a shared completion objective rather than defending opposing positions.
• Daily NEC early warning and risk-reduction meetings after the reset ensured risks to cost and programme were identified and mitigated continuously, enabling the fixed November 2023 opening date to be achieved despite Covid-19, supply shortages, inflation and ongoing hidden-structure discoveries.
• NEC's compensation event process provided a clear, transparent mechanism for valuing over 800 changes throughout the project, with the final account settled at practical completion and no outstanding disputes remaining.