So now we have Boris Johnson calling for the British lion to "roar" after Brexit. The lone British lion is a mighty beast, through Johnson's Brexit-tinted spectacles, able to live as a mighty independent animal free to wander and hunt at will, unshackled by the constraints of Europe. I wonder however whether Johnson is aware of how lions actually live. They live together in prides because being in a bigger group is more effective and gives a better chance of survival for each individual lion. Animals that leave the pride tend not to survive for long.