Louisa Guy from Slow Horses is portrayed as a richly complex MI5 agent whose character evolves through tragedy, resilience, and allegiance.

Hans Wilsdorf, Rolex’s founder, was allegedly a Nazi sympathiser and MI5 espionage suspect during WWII, according to newly ...

Dame Stella Rimington, who has died at 90, was the first female director general of MI5, the first to be named publicly and, ...