MI6 will be led by a woman for the first time in the foreign intelligence service's 116-year history. Blaise Metreweli, who joined the Secret Intelligence Service in 1999, will become the 18th chief of the organisation and take over from Sir Richard Moore later this year.

A former “Q,” she will be the first woman to lead Britain’s foreign intelligence service in the agency’s 116-year history.

A spook for over a quarter of a century, Metreweli was ‘Q’ at the spy agency. Now she’ll be known as ‘C’. Here’s why.