Royal Visit to Anglesey 9th August 1958 This plaque expresses the pride of the people of Holyhead at the fact that Her Majesty Queen Elizabeth II H.R.H. Duke of Edinburgh H.R.H. Prince Charles, Prince of Wales and H.R.H. Princess Anne Came ashore here on the 9th August 1958 and that this was the first visit by Prince Charles to the Principality after his creation as Prince of Wales