I don’t know which “rock in the North Atlantic” you are talking about. Rock All, or the island of Britain?
As for use of LNG as fuel for ships, ferries and tugs another rocky outcrop in the Atlantic called Norway was a pioneer. They are now aiming to be the same for hydrogen:
This from Splash 24/7 today:
One thing that has held back LNG as marine fuel is the lack of bunkering facilities. (which is now improving) To ensure the same doesn’t happen with hydrogen a bunker vessel has already been designed. (Now waiting on customers before building commence):