Type 45 - HMS Dragon - a couple of small observations re this wonderful Mod. Not a criticism, just observations, there are no hard and fast rules as such.
Flags - At sea it is normal for RN ships to fly a Naval Ensign from a yard, as per the attached image. Entering harbour or alongside they would have a Naval Ensign flying on the stern and a Union Flag on the bow. It would be unusual to have a ship at sea flying just a Naval Ensign at the stern, that flag post would be removed to allow for flying stations. That said you see all manner of flag arrangements so this mod is not wrong, just unusual.
GPMG Machine Guns - At sea these would normally be removed and stowed below decks, normally they only man them for entering or leaving harbour or where there is a threat from small boats. So again, not wrong, just unusual.
HMS Dragon - The red dragon on the bow is very unusual for the RN which is normally VERY conservative when it comes to decoration (some would say anal !!). I have no idea what has changed but they now have dragons on the sides of three warships that I know of, in my day all that was allowed on the hull was rust, and that's was never for very long !!!
Super Mod mate, well done.