I hope you're right, but one also has to remember that his great hero is Winston Churchill, and I can see him seeing himself in Churchillian defiant "we shall fight them on the beaches" mode. In 1940, all seemed lost for the UK - the USA had written off the UK and the only potential help, the Imperial Dominions, weren't exactly just down the road. Yet it survived, to become the unsinkable aircraft carrier from which Europe was liberated. I seem to recall references to Churchill's "sunlit uplands" in the Brexit speeches, so the Churchillian mentality seems to be strong. My fear is that reverence for this vanished historical era, apparently strong among the public school/Oxbridge English ruling class, may cause them to do something daft.