My opinion is that Corbyn was interviewed on radio 4 today programme shortly after being elected leader. When asked about the privy council, he said that he had not given it much thought, and when he was informed he would have to kiss the queens hand, he said he did not realise that. Frankly I do not believe that. His advisors would have told him what the procedure was, and a politician of his experience would almost certainly have known that. He was being deliberately awkward. When other people have been elected as leader of the opposition, there has never been an issue. Corbyn himself created that issue. Yes Cameron took three months to join the privy council, but the queen knew in advance that he would not be able to attend. Corbyn though just said he had a prior engagement, something he made no mention of before the privy council met. This was just Corbyn yet again trying to act like a rebel, when in fact as the leader of her majesty's opposition he should have been acting like a statesman.