Gruinard Island

Gruinard Island is a small, uninhabited island off the northwest coast of Scotland. It is best known as the location of British government biological-weapons trials during the Second World War.

The island’s terrain is modest in scale - primarily rocky shorelines and low vegetation - and it was left uninhabited following contamination from anthrax spores associated with wartime testing. Its history as a test site made it notable in discussions of biological safety and postwar remediation.

Following decades of quarantine and remediation efforts in the later 20th century, the island’s contamination status and public access have been the subject of official testing and policy. It remains uninhabited and is not a regular tourist destination.

Situated off Scotland’s northwest coast, the island lies close to the mainland seaboard and is visible from nearby coastal points; visits require private vessel access and awareness of any local access restrictions.

• Anthrax trials: Site of British biological weapons trials during World War II when anthrax was tested; the island was quarantined for decades afterward.
• Access: Remains uninhabited and is reached only by private boat; access has been restricted historically for biosafety reasons.