The Isle of May Light Beacon is a Scheduled Ancient Monument situated on the Isle of May in the centre of the Firth of Forth. Constructed around 1636, it is Scotland’s earliest purpose-built lighthouse and is believed to be one of the oldest surviving lighthouse structures in the world. Over time, the building fell out of use, and traditional repair materials were replaced by more economical short-term solutions. Combined with a reduced maintenance workforce, these factors led to a gradual deterioration of the structure.

In response to growing concerns about the beacon’s condition, GRAS was appointed to conduct a detailed survey and develop recommendations for its conservation and repair. Following the granting of Scheduled Ancient Monument consent, GRAS worked closely with Historic Environment Scotland and specialist conservators to deliver a comprehensive programme of works that secured the building’s long-term future.

The project faced significant logistical challenges due to the remote location, harsh weather, and tidal conditions. Additionally, construction periods were restricted to certain times of the year because the Forth Islands are designated a Special Protection Area. Despite these constraints, a carefully planned schedule of works was completed, including masonry repairs, re-harling, application of limewash, replacement of defective joinery, and the delicate conservation of the armorial panel above the entrance.

The project required a collaborative and well-informed approach involving multiple stakeholders with sometimes competing priorities. Extensive research, meticulous pre-planning, and phased execution were essential to its success, alongside rigorous on-site quality control to ensure the highest standards were maintained throughout the works.