Harry Houghton Betrayed the Admiralty From 1951 to 1961
By Constance Bell ·
Naval secrets were leaked for a decade by a clerk at the Admiralty Underwater Detection Establishment, a betrayal recorded in the Security Service's personal files.
British sailors and naval commanders operated under the delusion that their underwater detection capabilities were secret. The reality was that for ten years, those safeguards were being handed to the Soviet Union, leaving Western fleets blind to the threats beneath them.
The catalogue entry for file KV 2/4384 in the UK National Archives identifies Harry Frederick Houghton as a British citizen and a "Soviet spy convicted of espionage in 1961." He did not hold a high-ranking commission or a glamorous diplomatic post; he was a clerk. But in the world of intelligence, the clerk is often the most dangerous person in the room. They are the ones who file the reports, route the memos, and possess the keys to the cabinets that the generals assume are secure.
Portland and Warsaw
Houghton served as a clerk in the Admiralty Underwater Detection Establishment at Portland. To the casual observer, his role was administrative. To the Soviet Union, he was a vital conduit for technical intelligence. The establishment at Portland was not a place of clerical mundanity; it was the frontline of acoustic warfare, tasked with the critical job of spotting Soviet submarines before they could strike. When Houghton passed "classified material" to Moscow, he wasn't just leaking papers; he was compromising the very methods the Royal Navy used to perceive the ocean.
The file's catalogue entry records a significant detail about Houghton's history: he had previously worked at the British Embassy in Warsaw. For a student of the Cold War, this is a flashing red light. Warsaw was a city under the heavy thumb of the Polish People's Republic and a primary recruiting ground for Soviet intelligence. The transition from the embassy in a satellite state to a sensitive naval installation in England suggests a long-term grooming process, one that likely began before he ever stepped foot in Portland.
1951 to 1961
The timeline of Houghton's betrayal is particularly stark. According to the catalogue description, the "consensus of opinion" among investigators was that he had been a spy from 1951 until his arrest in 1961. This was not a momentary lapse in judgment or a sudden reaction to a crisis; it was a decade of sustained, disciplined treason.
For ten years, Houghton operated within the heart of British naval security while the Security Service—MI5—remained unaware of his activities. The file is categorized under the "Security Service: Personal (PF Series) Files," specifically within the section for "SOVIET INTELLIGENCE AGENTS AND SUSPECTED AGENTS." The existence of this file indicates the eventual success of the counter-intelligence effort, but the dates highlight a catastrophic failure of vetting.
During this decade, the Cold War shifted from the early tensions of the 1950s to the brink of nuclear confrontation. Every piece of information Houghton provided regarding underwater detection gave the Soviet Navy an advantage in the Atlantic, potentially allowing their submarines to evade detection and threaten the shipping lanes that linked the United Kingdom to the United States.
Ethel Gee
Houghton did not act alone. The catalogue entry states that he "conspired with another employee Ethel Gee to pass classified material to the Soviet Union." The inclusion of Gee transforms the case from a lone wolf operation into a conspiracy within the workplace. When two employees in the same office are compromised, the internal security of the entire installation collapses.
Public records identify Houghton and Gee as members of the Portland spy ring, a cell that functioned as a pipeline for the Soviets. While the catalogue entry for KV 2/4384 focuses on Houghton, the mention of Gee confirms that the breach at the Underwater Detection Establishment was systemic. The two worked in tandem to identify, copy, and transmit documents that should have been protected by the highest levels of naval secrecy.
While other records in the UK National Archives, such as files CSC 11/136 and KV 2/4385, further document Houghton's career and his conviction, the summary in KV 2/4384 serves as a cold ledger of his utility to Moscow. It records the basic facts of a life spent in the shadow of a double loyalty.
The catalogue entry concludes by noting the consensus of opinion that Houghton’s activities began in 1951 and continued without interruption until the moment of his arrest in 1961.