Photos and film of a police officer wearing a hijab on the front line went viral last year. But police constable Ruby Begum used Twitter to insult Jews and mock the 9/11 attacks before joining the Met. Scotland Yard faces questions over how her rants were missed during vetting. She communicated over many months with a woman who fled Europe to live under IS's so-called caliphate. The Met has now launched an investigation, while Miss Begum has been placed on 'restricted duties'. She works for the Met's taskforce dealing with public order and has run a Twitter account since 2012, posting 25,000 messages. Interspersed with commonplace concerns are posts that will dismay Met Police chiefs battling longstanding accusations of institutional racism.