More than 500 British Armed Forces personnel stationed at some of the UK’s most sensitive military sites have exposed their locations and details through a fitness app.
Those publicly logging exercise routes on the Strava app include staff at the military’s central command headquarters in Northwood, as well as personnel at Faslane - home to Britain’s nuclear deterrent.
Officials working at a surveillance and intelligence facility in North Yorkshire have also been identified through the platform.
At one joint UK-US installation, runners even labelled a tracked route “Security Breach” in an apparent acknowledgement of the issue.
A senior military source based at Northwood told The i Paper that the situation poses a significant security threat, exposing personnel to potential blackmail and coercion.
They described the data as “damn good intelligence for the enemy”.
While the locations of British military bases are publicly known, officials fear the app reveals far more sensitive operational detail - including patterns of movement, routines and personal habits.
The data can also expose information about service members’ families.
More than 500 British Armed Forces personnel stationed at some of the UK’s most sensitive military sites have exposed their locations
| GETTYThe risks come amid growing fears over hostile state activity targeting UK military infrastructure.
Last month, an Iranian man and a Romanian woman were arrested after allegedly attempting to gain access to the Faslane naval base.
Earlier this year, British Nato personnel were warned about suspected Russian intelligence operatives attempting to monitor them.
Analysis of Strava activity by The i Paper found submarine crew members at HMNB Clyde could be identified through data shared on the app.
BRITAIN'S ARMED FORCES - READ MORE:
The risks come amid growing fears over hostile state activity targeting UK military infrastructure
| GETTY
Analysis of Strava activity found submarine crew members at HMNB Clyde could be identified
|GETTY
One tracked route within a restricted area even revealed details that could identify the specific nuclear submarine an individual was assigned to.
Since the beginning of 2026, a total of 519 personnel, contractors and associates have recorded activity within secure zones.
This includes individuals across a range of ranks, from junior officers to intelligence specialists.
Security experts have warned that the level of detail available could allow adversaries to build comprehensive profiles of military personnel.
Conservative MP Ben Obese-Jecty lambasted the situation as 'beggars belief'
|HOUSE OF COMMONS
They caution such data could even be used to help guide drone or missile strikes with greater precision.
Conservative MP Ben Obese-Jecty lambasted the situation, saying: "I stopped using Strava when I became an MP and I locked down my profile long before that.
"The app has numerous features to enable you to keep your data private."
He added: "It beggars belief that our armed forces don't have a grip of this given the current, and very real, threat posed by sub-threshold activity from our adversaries."
A Ministry of Defence spokesman said: "We take the security of our personnel very seriously and keep guidance for them under constant review."
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