Installers made use of the existing high-quality housings, which were all retested, and CE marked to current standards and fitted with Philips METIS 2816 LED insert trays. By reusing the existing fittings, the project was achieved with minimal material waste, contributing to a more circular economy. As the new lights were made to perfectly fit the existing fittings, installation could be completed with minimal disruption to road users. Installers worked during late night and early morning hours over five weeks, with each lantern taking just five minutes to strip out and replace. Reusing materials also kept the project’s capital expense to a minimum, saving an estimated €3 million (£2.6 million) compared to a new installation.