St Mary’s Church, located in Harrow-on-the-Hill, sits at the top of one of London’s highest elevations, standing 50 meters above ground. This Grade I listed church underwent a significant restoration and renovation carried out by George Gilbert Scott between 1846 and 1849.

A major challenge during this undertaking was the design and construction of the scaffolding necessary to fully encase the tower and spire. This scaffolding was crucial in safeguarding the building’s fabric from environmental exposure throughout the duration of the project. Our collaborative design process (CDP) ensured that the scaffold was meticulously engineered to protect not only the church itself but also the adjacent graves.

In this exceptional project, Stone Edge Conservation was entrusted with the replacement of the entire lead-covered spire, using new code 7 and 8 lead. The scope of work also encompassed structural repairs to the timber framework of the main spire, refurbishment of the cross and weathervane, as well as masonry repairs to the tower.

Furthermore, part of the enabling works required coordination with the Ministry of Defence, as the spire houses an aircraft warning light due to its elevation. This light was temporarily relocated, refurbished, and subsequently reinstated upon completion of the restoration efforts.

A commemorative plaque was gifted by SECL to recognise the work of the incumbent churchwardens.