Documenting the coastal erosion-driven collapse of a Cold War underground monitoring station via laser scanning

Rapid soft-cliff coastal erosion along the Holderness Coast, United Kingdom, continues to result in the loss of infrastructure, including buildings of local historical interest. The terrestrial laser scans presented in this data note were collected to document the post-failure condition of the Tunstall Royal Observer Corps monitoring post; a Cold War structure progressively exposed by ongoing soft-cliff coastal erosion. The structure was discovered to have collapsed onto the beach by local residents on the morning of 23 January 2026 and was subsequently surveyed by the authors on the same day. The objective of the survey was to generate a detailed archival record of the post-collapse condition before subsequent damage from ongoing coastal erosion. This dataset is part of a wider body of work drawing on volunteered geographic information to visualise geomorphological change between December 2025 and January 2026. This dataset represents the outputs of a terrestrial laser scanning survey and comprises an aligned point cloud generated from seven cliff-top and beachfront scan positions. The supplied point cloud (.laz) contains approximately 274.7 million points and captures the collapsed structure and the surrounding geomorphology. Not applicable.