The King's College service was immensely successful, and the following year Milner-White made some changes to Benson's original format, notably introducing the tradition of opening the service with a solo treble singing "Once in Royal David's City". This was then followed by a bidding prayer penned by Milner-White himself, and re-ordering the lessons. The choir had 16 trebles as specified in statutes laid down by Henry VI, and until 1927 the men's voices were provided by choral scholars and lay clerks. Today, 14 undergraduates from the choir sing the men's parts.