A declassified MI5 file has revealed a Cold War-era KGB plot to contaminate Loch Ness with radioactive waste, aiming to disrupt the UK's tourism industry and tarnish its international image. The plan, hatched in the 1970s, involved dumping a highly radioactive substance into the famous Scottish loch, which is a major tourist attraction. The operation was allegedly approved by senior KGB officials, though it was never carried out.
The file, released to the National Archives, details how Soviet intelligence sought to exploit the loch's global fame by introducing a radioactive isotope that would render the area hazardous for decades. The plot was part of a broader campaign of 'active measures' against the West, which included disinformation and sabotage. MI5 learned of the scheme through a double agent inside the KGB, who provided detailed plans and the names of operatives involved.
According to the documents, the KGB had secured a supply of polonium-210, a highly toxic radioactive element, from a secret nuclear facility. The plan was to transport the polonium to Scotland disguised in a diplomatic bag, then release it into the loch using a specially modified boat. The contamination would have been catastrophic, potentially causing long-term health risks to locals and visitors, and devastating the region's economy.
The plot was foiled when MI5 tipped off the CIA, which then pressured the Soviet leadership to abandon the operation. The KGB operatives were recalled to Moscow, and the polonium was never deployed. The file notes that the scheme was considered 'extremely reckless' even by Soviet standards, and that it was likely ordered by the KGB chairman, Yuri Andropov, who later became Soviet leader.
This revelation adds to the known history of Soviet-era plots against the UK, including the poisoning of Alexander Litvinenko in London with polonium-210 in 2006. That attack, carried out by former KGB agents, left a trail of radioactive contamination across the capital. The Loch Ness plot, though never executed, underscores the lengths to which the Kremlin was willing to go to undermine its adversaries.
