London Mayor Boris Johnson backs Brexit, joins Cameron dissenters

London (dpa) - London Mayor Boris Johnson, one of the British Conservative party‘s best-known figures, announced on Sunday that he will campaign to leave the European Union ahead of a referendum, setting him at odds with Prime Minister David Cameron.Cameron has given members of his Conservative party the option of backing his bid to stay in a reformed EU or supporting a so-called Brexit from the bloc in an in-out vote set for June 23."There is too much judicial activism. Too much legislation coming from the EU," Johnson said as he announced which side he was backing to reporters in the British capital.He praised Cameron‘s efforts in hashing out a reforms deal with other EU leaders in Brussels at the weekend, adding that his decision had been "agonizingly difficult."However, the mayor‘s decision deals another blow to the prime minister‘s campaign to remain an EU member.Johnson joins six cabinet ministers who have already lent their support to the Vote Leave campaign.