Bydd Iarll ac Iarlles Wessex yn bresennol hefyd fel gwesteion y Prif Weinidog. Traddodir yr anerchiad gan Archesgob Cymru, y Parchedicaf John  Davies.
The service will be attended by Their Royal Highnesses The Earl and Countess of Wessex, as guests of the First Minister. The address will be given by The Archbishop of Wales, The Most Reverend John Davies.