T ISTEKERS who have heard previous broadcasts from Hyde Park on Empire Day will know how deeply moving these ceremonies can be. This evening's is to be arranged on somesvhat different lines from its predecessors. Massed choirs from the London churches will lead the community singing, and the massed bands of the Guards will play, and the ceremony will close with a message personally delivered by the Prime Minister, followed by the singing of ' Auld Lang Syne.'