could serve at one time. In 1821 George IV appointed Sir John Jervis as a second admiral of the fleet, to balance the Duke of Wellingtons promotion as a second Field Marshal in the British Army. In 1830 King William IV increased the number of admirals of the fleet to three, though these additional lifetime postings subsequently lapsed. Between 1854 and 1857 there was no admiral of the fleet at all as the most senior naval officer of the time Admiral of the Red Thomas Le Marchant Gosselin was mentally ill and had not served at sea for forty-five years. In deference to Gosselin's seniority the position was instead left vacant until his death in 1857, whereupon it was filled by Admiral Charles Ogle. In practice the rank had lost its formal authority from 1828, when the professional head of the Royal Navy was given the title of First Naval Lord (renamed First Sea Lord in 1904). Thereafter it was periodically granted to retiring First Naval Lords as an honorary promotion, only passing to the most senior Admiral if there was no other candidate. On occasion even this seniority principle was abandoned, as on the death of Provo Wallis in 1892 when the promotion went to John Edmund Commerell rather than the senior Algernon Frederick Rous de Horsey. Twentieth century The organisation of the British fleet into coloured squadrons was abandoned in 1864, though the rank of admiral of the fleet was maintained. During the two World Wars a number of serving officers held active commissions as admirals of the fleet, as well as the First Sea Lord. e.g. Sir John Tovey. Prince Philip, Duke of Edinburgh was created an Admiral of the Fleet in the Royal New Zealand Navy in 1954, following the coronation of his wife Elizabeth II as Queen. This promotion was to a New Zealand rank, separate from the Royal Navy rank. Following the creation of the Chief of the Defence Staff in 1959, the five naval officers appointed to that position became admirals of the fleet. Recognizing the reduced post–Cold War size of the British Armed Forces, no further appointments were made to the rank after 1995 when Sir Benjamin Bathurst was appointed admiral of the fleet on his retirement as First Sea Lord. The rank was not abolished and in 2012 the Prince of Wales (now King Charles III) became an honorary admiral of