LONDON (Reuters) – Britain’s finance and health ministers resigned on Tuesday in what looked to be the final blow for Prime Minister Boris Johnson’s premiership after he had tried to apologise for the latest scandal to dog his administration. REACTION FROM FINANCIAL MARKETS: PHILIP SHAW, CHIEF ECONOMIST, INVESTEC “It’s increasingly difficult for the prime minister to hang on. It seems quite similar to what happened to Theresa May when Boris Johnson and David Davis resigned in fairly close proximity to one another over Brexit. “The initial gut reaction would be… to sell the currency. However,…