Please, commuters: activate this time-saving iPhone setting before you travel tomorrow

I’ll be the first to admit that I’m not a morning person. Waking up at the crack of dawn to commute through Central London is a challenge at the best of times, but it’s a particularly unforgiving experience in winter, when the sun ascends more slowly than a geriatric mountaineer and Jack Frost pays regular visits to anything outdoors.You’ll forgive me, then, for being more irritable than usual before 9am, and I’ve developed a real pet peeve during recent morning commutes: the ‘Tube gate holder-upper’. You know the ones – those equally bleary-eyed train travellers who …

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