This is going to be a spectacular model. I admit I had some initial reservations about the way you were doing the "sea," but now it looks great. It has much of the character and color of the old master seventeenth-century marine painters - just right for this particular model. The various "waves" look almost like the brush strokes in a Van de Velde painting.
Personally I don't like vacuum-formed plastic sails, but I like what you've done with this set. Again, it's consistent with the character of the rest of the model.
With, I'm afraid, one exception. This is the sort of thing that you'd probably catch yourself if you weren't so close to the project. Sometimes a fresh pair of eyes picks up things that the modeler doesn't.
The ship is making quite a few knots in a choppy sea, creating a massive bow wave and leaving quite a wake. The wind is obviously blowing pretty briskly to kick up such a sea. And the ship is moving pretty fast. But Airfix molded those sails as though they're almost becalmed, with just a breath of air catching their bellies.
There are several obvious solutions, the best of which might be to use the vacform sails as patterns for a scratchbuilt set that's being really blown in the wind. (Given the state of the sea in the base, I think she'd look natural with only the foresail, fore topsail, main topsail, and spritsail set - and the others furled.) I've never tried it myself (my personal preference is for furled sails), but I suspect a convincing set of sails could be made out of artist's vellum paper.
Whether you do something about this is, of course, entirely up to you. I have no idea how many viewers of your model would catch the problem. But I strongly suspect you would have - without my help - when you started setting those sails.
Since I'm alread being rude, I wonder if I might make another, much smaller suggestion. The title of this thread has a conspicuous typographical error in it (the sort I make frequently). The name of the ship is, of course, Royal Sovereign - or better yet (as I mentioned early in the thread) Sovereign of the Seas. The goof could be fixed in a few seconds, but the only person who can do it is the post's originator.
Again, this is going to be a great model. Do keep us posted.