Westminster attack a 'wake-up call for tech giants over online terror content'

The acting head of Scotland Yard delivered a stark message to platforms which have come under fire for hosting extremist material

The Westminster attack must be a "wake-up call" for technology giants over their efforts to tackle terrorist content online, the acting head of Scotland Yard has warned.

Craig Mackey delivered a stark message to platforms which have come under fire for hosting extremist material, calling on them to grasp what it means to "put your own house in order".