 Admiral Sir Michael Denny replaced Creasy as Commander @-@ in @-@ Chief , Home Fleet , on 5 January 1954 and Vanguard participated in Exercise Medflex A with Dutch and French ships in March . During the rest of the year she participated in anti @-@ submarine and anti @-@ aircraft exercises as well as making port visits to Oslo and Kristiansand in Norway and Helsingborg in Sweden . She was inspected on 11 July by King Gustaf VI Adolf of Sweden before returning home later that month . Denny struck his flag on 15 September , and Vanguard sailed to Devonport for a £ 220 @,@ 000 refit 10 days later . The February 1955 Defence Estimates had intended her as the Home Fleet flagship with a role as a Sverdlov @-@ class cruiser killer , but after the appointment of Earl Mountbatten in April 1955 and with Antony Eden replacing Churchill as prime minister , the government decided instead to maintain two extra cruisers in the fleet , and Vanguard was placed in reserve when it was completed its 1955 refit ; she subsequently became the flagship of the Reserve Fleet when Vice Admiral Richard Onslow hoisted his flag on 28 November . While moored in Fareham Creek , during her time in the reserve fleet , waterline shots of Vanguard in Portsmouth Harbour were filmed for the title sequence of the 1957 comedy film Carry on Admiral . Just before decommissioning , scenes for the 1960 film Sink the Bismarck ! were filmed aboard , with Vanguard being used to depict interiors of the bridges , Admiral 's Quarters and gun turrets for Hood , Bismarck and King George V. 
