Running app Polar Flow exposes locations of spies and military personnel

Investigators say workout data can also be used to identify staff at classified facilities such as MI6 and White House

GCHQ is planning to expand from its current base in Cheltenham
Fitness maps tracked personnel at top-secret sites including the GCHQ intelligence facility in Cheltenham
(Image credit: Ben Birchall/AFP/Getty Images)

Fitness tracking app Polar Flow has been broadcasting the whereabouts of personnel at military bases and intelligence services across the globe, an investigation has revealed.

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