Public reassurance is one of the first duties of the government in difficult times. The early months of the Covid pandemic offer a case study in how to get this wrong. Boris Johnson was paralysed by indecision and denial of the severity of what was unfolding. Panic-buying cleared supermarket shelves of essential goods.

Sir Keir Starmer is unlike Mr Johnson in temperament and work ethic, but he too is struggling to get ahead of events in a global crisis. It isn’t easy when the origin of turbulence is a superpower gone rogue. Donald Trump’s impulsive actions can’t be anticipated with epidemiological precision like a virus.

Sir Keir has extremely limited influence over the course of events in the Middle East. He showed sound judgment in refusing to put British forces at Mr Trump’s disposal to bomb Iran. It is not Britain’s war, as the........

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