On Ch5 now.
Now I'm no military expert but I know officers in the Navy on active duty do NOT wear kharki and there is no way on earth we would ever call a naval ship HMS Sparrowhawk 
I'm sure there's more inaccuracies that have missed my civilian eye but I can't be the only one who is irrationally annoyed at the sloppy errors?
Now obviously if I am wrong be gentle with me... but at the moment I keep muttering "ffs!" Every time they utter the ship's name or the a captain appears on the screen wearing what looks a bit like army uniform and it is rather spoiling my enjoyment 