` 2011 (UTC) : Ryan, please DO NOT include the pennant number of any pre-war British warship in the title of an article. Unlike the US Navy, where warships are issued with sequential hull numbers when they are ordered and retain those numbers throughout their life, in British (and other European) navies there are no hull numbers. The pennant numbers which were issued the ships were issued at random (using any number which happened to be available), and were often subject to variation; pennant numbers were in any case a fairly recent innovation, dating from the start of World War One, prior to which there were no numbers issued to British warships. Many smaller warships changed their number (and certainly the ``flag superior`` part of the pennant number (i.e. the alphabetical letter preceding the actual number), sometimes several times. The convention that has been agreed by Wiki editors for pre-1948 British warships is that the ships name is followed (in brackets) by the year of launch; the year of launch is thus used to distinguish between warships which have had the same name - for example, there have been sixteen British warships bearing the name HMS Phoenix, going back to the 16th century, of which your submarine was the last one; thus the launch date is used to distinguish between them, e.g. ``HMS Phoenix (1929)``, ``HMS Phoenix (1911)``, ``HMS Phoenix (1895)``, ``HMS Phoenix (1879)``, ``HMS Phoenix (1832)``, etc. Regards, Rif.   20:38, 24 November`