After spending much of her career observing Iran and its proxies from Middle East stations, MI6 chief Blaise Metreweli has reached the top of her organisation just as the threat from Tehran becomes acute.
With Jewish communities in the UK and Europe targeted in a wave of vicious violence and arson attacks, a previously unseen extremist Shia collective, Harakat Ashab al-Yamin al-Islamia or HAYI, has been claiming responsibility for the violence. Videos of attacks, including one on a synagogue in west
