The old library building is being retained and repurpose and the scheme is achieving a BREEAM Very Good certification. Through the construction phase we have sought to reduce the carbon content of the major constituent parts and identified considerable reductions in embodied carbon emissions, particularly with the use of materials with high recycled content and high recyclability. Overall, across the whole site 99.66% of all waste has been recycled to date by the end of 2020. Furthermore, much of the Roman red sandstone blocks recovered as part of the archaeology excavations on the site are being reused by skilled stonemasons to repair the city walls and match the existing stones used.