Service of the Century. Choral Evensong is the longest-running outside broadcast in the history of broadcasting. Since the first wireless relay was heard from Westminster Abbey in 1926, Choral Evensong broadcasts have maintained their special place through the years of world war and through the turbulent years leading to the end of the century. Today's service is a composite of broadcasts from cathedrals and chapels recorded earlier this century, with material from the National Sound Archive of the British Library and the BBC's own archives.