The ceremony, which is a tradition which started over 500 years ago, is shown on television (BBC1: 10.45am - 12.30pm). You can watch the Queen arriving or leaving in her coach: it leaves Buckingham Palace at 11am, follows the Mall to Horse Guards, passes through to Whitehall and then travels past the Cenotaph to Parliament Square. At 11.15 a cannon is fired in Hyde Park. Possible places to watch include the northern and north-eastern edges of St James's Park and in front of the Houses of Parliament