| UPDATED: 11:01, Thu, Jan 7, 2021 Link copied Sign up for FREE now and never miss the top Royal stories again. SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. Prince Charles, 72, is the oldest heir apparent in British history and is expected to take the crown when Queen Elizabeth II, 94, can no longer serve. As the future head of the Royal Family, Charles is key to the monarchy's survival and, as with all senior royals, there is a plan in place in case of his death. Operation London Bridge is the codename used for the plan to be enacted in the days following the Queen's death and her son Prince Charles has a similar set-up.