We’re not very productive. Stagnant productivity is the reason wages have flatlined since 2008, leaving our pay packets £14,000 lighter than if they’d kept growing. British economists and policymakers worry about this a lot.

We are always on alert for signs of low productivity. For me, warning signs start flashing immediately after lunch. My mind slows, creativity dims and the inbox fills up. I thought this was a personal weakness. Or maybe just my soul dying slowly after another trip to Pret.

But........

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