New safeguards to stop schoolchildren being radicalised online might have stopped three teenage girls travelling to Syria, according to a government minister.
Kadiza Sultana, Amira Abase and Shamima Begum disappeared from Bethnal Green in east London in February and are thought to have joined Islamic State militants as 'jihadi brides'.
CCTV footage showed the three pupils from Bethnal Green Academy travelling throughTurkey before crossing the border to Syria.
Ministers today announced new rules to try to protect pupils from extremist websites.
Schools will told to fit strong filters to classroom computers and to monitor internet access by students.
Schools minister Nick Gibb said the new guidelines could have alerted staff at Bethnal Green Academy to what the girls were planning.