He is bailed to appear at Charing Cross police station on 2 April. In January, he was arrested outside the Princess's gym, in south London, for obstructing the highway. He was not prosecuted because of insufficient evidence.
A doctor who has followed the Princess of Wales on many engagements has been arrested for a second time. Klaus Wagner, 37, from Germany, was handing leaflets to tourists outside Buckingham Palace on Saturday when he was held on suspicion of a breach of the peace.