Whose Flag is this?

  It was the Flag of the Old Admiralty Board , which is three gold anchors on a red background. It was established in 1545, lasted for 287 years, and abolished in 1832. It is now the official Flag of the National Maritime Museum which came about in the late 1950's, and on special occasions it is flown from the 103 foot mast, erected at the NMM, formerly the mizzen mast of the old Royal Yacht Victoria and Albert (1899-1955) and the Gaff, the fore t'gallant of the Cutty Sark (1896)