British police say arrests will be made as necessary after a demonstration outside the Danish embassy in London on Friday. Scotland Yard has been stung by criticism from politicians and the press for apparently adopting a softly-softly approach to the inflammatory banners waved by some protesters.Anjem Choudary was one of the organisers: “The police had every opportunity to give warnings, to seize placards, to arrest people. There were no such warnings given, there was no seizure of placards and arrests.” The protest was one of many against cartoons of the Prophet Mohammed first published in a Danish newspaper. Among the demonstrators was a man dressed as a suicide bomber. Slogans included: “Butcher those who insult Islam”, and “Europe you will pay, your 9-11 is on the way.” Dominic Grieve from the opposition Conservatives said: “It is a serious breach of the law, it’s a very serious criminal offence to call for people to kill others. And although it wasn’t specifically targeted at individuals I think it was perfectly clear the sorts of people they were calling on to be killed.” Police say specialist officers recorded evidence during the demo for later use. Mainstream Muslim groups in Britain have condemned the actions of some of the protesters.