Elizabeth Tower

Westminster, Greater London

AABC Conservation Award

The comprehensive refurbishment of the Elizabeth Tower, colloquially known as Big Ben, exemplifies a masterful application of historic building conservation techniques. The meticulous approach to preserving and enhancing this globally iconic structure demonstrates an exceptional commitment to authenticity, durability, and public accessibility, yielding immense benefits for the community and its users. One of the most notable aspects of the project is its emphasis on historical accuracy and fabric conservation. Through rigorous research and consultation with Historic England, the restoration reintroduced the original Prussian blue and gilded decorative schemes to the clock dials, informed by archival watercolour designs and paint analysis. This not only reinstates the tower's authentic aesthetic but also fosters a deeper public connection to its historical narrative. The use of Cadeby magnesian limestone, closely matched to the original Anston stone, highlights the thoughtful material selection that respects the tower’s heritage while ensuring structural integrity. Equally commendable is the attention to long-term sustainability and practicality. The replacement of outdated mechanical and electrical systems with energy-efficient services showcases a forward-looking approach, reducing environmental impact and ensuring the tower's functionality for decades. The addition of a bespoke lift within the disused ventilation shaft significantly improves accessibility without compromising the tower's structural or visual integrity - a remarkable engineering feat that enriches the visitor experience. The project also underscores the importance of collaborative innovation in conservation. Leveraging BIM Level 2 technology facilitated precise planning and execution, enabling the integration of modern interventions such as the lift and improved servicing systems into the historic structure with minimal disruption. Furthermore, the use of advanced off-site restoration methods for the cast iron roof and other elements exemplifies the application of modern techniques to prolong the life of heritage materials. The benefits to the community and users are manifold. Enhanced public access, including an increased capacity for tours and an efficient ticketing system, allows a broader audience to engage with this architectural marvel. Visitors frequently praise the immersive experience, from climbing the 334 steps to witnessing the belfry's grandeur. Additionally, the project serves as a valuable educational resource, showcasing best practices in conservation and inspiring similar endeavours worldwide. 

Judges’ Comments:

“The Elizabeth Tower refurbishment is a landmark achievement in historic conservation. By harmonizing historical fidelity, innovative technology, and community engagement, it preserves a vital symbol of British democracy for future generations while enriching the cultural fabric of society.”