“Very brave, Minister” says Sir Humphrey, the senior civil servant in the classic 1980s sitcom, Yes Minister. “Brave?” cries the minister in horror. Sir Humphrey might give the same compliment to Conservative Leadership candidates. Standing to be Prime Minister of Great Britain today is indeed brave. Domestic challenges are a staple for the leader of a nation but making Brexit work at the same time as rebuilding a post-Covid society and economy would be exceptional challenges even in a tranquil season of global politics. But we are not in a tranquil season of global politics. The pressures of …