"Eleven people have been arrested around Britain for making 'racist or anti-religious' comments on Twitter following the brutal killing in Woolwich on Wednesday."

"A force spokesman said 'We have received a number of reports from local members of the public about tweets and Facebook comments that could potentially incite racial hatred and violence."

Superintendent Matt Goodridge said: 'Surrey Police will not tolerate language used in a public place, including on social media websites, which causes harassment, alarm or distress.'