Edward will become the Duke of Edinburgh but will have to wait until Charles is king

Daily Mail

Buckingham Palace decided he would one day succeed his father as Duke of Edinburgh following his wedding to Sophie Rhys-Jones in 1999. https://www.dailymail.co.uk/news/article-9454055/Edward-Duke-Edinburgh-wait-Charles-king.html?ns_mchannel=rss&ns_campaign=1490&ito=1490