A British Islamic State recruiter known as the White Widow and her 12-year-old son are believed to have been killed in a CIA operation, after Donald Trump relaxed restrictions on the US spy agency’s drone strike programme.

Sally-Anne Jones reportedly died close to the border between Syria and Iraq, in a strike thought to have also killed her son Jojo Dixon.

The punk rock singer-turned-jihadist become Britain’s most wanted woman after fleeing to Syria from Kent in 2013 to marry computer hacker Junaid Hussain, an Isil fighter from Birmingham.

Jones became a prolific online recruiter for the extremist movement and is believed to have attracted dozens of female recruits using social media.

A defence source said the strike had been carried out by the CIA, which runs its own fleet of Predator drones armed with Hellfire missiles.