Helen Warrell

Covert operations in waters surrounding the British Isles pose a grave threat to critical infrastructure and a fresh challenge to Nato

Appointment of Blaise Metreweli comes as agents grapple with competing threats

Melting sea ice, rising tensions and the relearning of what it will take to master the art of Arctic warfare

A London espionage trial has provided rare insight into the activities of Jan Marsalek, the former payments executive, and how Moscow is outsourcing its spying

Ian Fleming’s fictional creation, a boon and burden to UK intelligence agencies, will now be defined by tech giant Amazon

Study into Prevent programme comes after FT investigation exposing prevalence of autism in counter-terror casework

Old Bailey hears that some members of group planned operation at a US military base near Stuttgart

Old Bailey hears surveillance of targets included specially designed glasses on planes and online honey traps

Two revealing books explore the unsung work and elusive lives of secretaries and intelligence agents on both sides of the Atlantic

The UK’s ‘Prevent’ initiative was set up to identify young people prone to radicalisation. Are we now in danger of criminalising vulnerability?