About 8,000 visitors were evacuated from the British Museum in London on Saturday, August 28, 2010, after a "strange smell" was reported, police and the museum said. The museum, one of Britain's top tourist attractions, was given the all clear after several hours and was expected to open as usual on Sunday, August 29, 2010. This File Photo taken outside the British Museum in London on February 4, 2004. AFP PHOTO/Nicolas ASFOURI. (Photo credit should read NICOLAS ASFOURI/AFP/Getty Images)

An 18-year-old woman who plotted an attack on the British Museum in London using hand grenades and Russian hand guns has become the youngest female in the UK to be convicted of terrorist offences connected to Isis.

Safaa Boular, who was 16 at the time of her arrest in 2016, was found guilty at the Old Bailey on Monday afternoon of two offences of preparing acts of terror and for attempting to travel to Syria for terrorism purposes.

The verdict comes a day after the one-year anniversary of the attack on London Bridge and Borough Market that led to the deaths of eight innocent people — one of four Isis-inspired attacks on the UK in 2017.

On Monday the government warned the severe terror threat level would remain in place for at least another two years as home secretary Sajid Javid announced a new counter terror strategy.

Boular, from Vauxhall in south London, was convicted along with her mother, Mina Dich, 44, her sister Rizlaine Boular, 22, who both pleaded guilty to also preparing acts of terrorism, and a family friend, Khawla Bargouthi, 21, who pleaded guilty to knowledge of the terror plots.

The Metropolitan Police, which worked on a covert operation with the UK security service MI5 over several months, said the four women formed Britain’s first-ever all female terror cell directed by Isis.

Judge Mark Dennis put off sentencing for six weeks for a report to be compiled.

Photo: Getty

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