Very nice set of flags. One small point - the Royal Standard is flown only when the monarch is present and only on the vessel in which he/she is travelling. In practice, this would be the Royal Yacht, the first of which was commissioned in 1660, with the last (Britannia) being decommissioned in 1997.
Btw, excellent knowledge ref. the simple Union Flags; most people think it was only used from 1707, but it was in fact designed almost immediately after James I/VI came to the English throne (he was already King of Scotland) and was intended specifically as a naval flag to mark English and Scottish ships on the high seas, although it was only incorporated into the White Ensign from 1707.