The end of the Royal Navy has provoked little or no interest. Of course, it has been a long time since Britannia ruled the waves and Britons were never, never, never to be slaves. All the same, Britain is an island. In 1940, the last time invasion was a likelihood, the Royal Navy was at least as significant as the air force in holding the Germans off. At that same moment, the Royal Navy had to destroy large parts of the French navy anchored at Mers el-Kebir to prevent it falling into German hands.