This time round, Charles tried to avoid the issue being raised again by not visiting the rock on his trip to Spain with Camilla. However, as if not to let the opportunity go by, the Prince of Asturias chose to make passing reference to the disputed territory in his speech at a gala dinner at the royal palace in Madrid.
"I express my hope that our authorities make progress towards a solution to our historic bilateral dispute which is yet to be resolved," said the 43-year-old Prince of Asturias in a speech at the Palacio Real in Madrid.
Spain still claims sovereignty over the Rock which is home to 28,000 Gibraltarians, who in a 2002 referendum overwhelmingly rejected a deal to shared sovereignty between the two nations and demanded to remain a part of Britain.
The King of Spain, his wife Queen Sofia and the Prince and Princess of Asturias are to be guests at the wedding of Prince William and Kate Middleton.
The two royal families share the same ancestor, Queen Victoria.
PS How do press photographers manage to consistently get pictures of Charles like this. Not only is he pulling the strangest face but he seems to be commenting to Felipe about his wife’s backside .