original: One of these, Zadok the Priest, has been played at every British coronation ceremony since.
simplifications: Zadok the Priest has been played at every British crowning ceremony since. Since than, Zadok the Priest, was played at every British coronation. Zadok the Priest has been played at every British crowning ceremony since then. One of these is Zadok the Priest. It has been played at every British coronation since. Zadok the Priest has been played at every British crowning ceremony ever since. Zadok the Priest has been played at every British coronation ceremony since. Zadok the Priest has been played at every British coronation ever since. One, Zadok the Priest has been played at every British crowning service since. Zadok the Priest  has been sung at every British coronation ceremony since then. One of these, Zadok the Priest, has been performed at every British coronation ceremony since then.