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The October "half-term," when schools in the capital take a break for a week or two, results in most attractions being overrun by children. The start of August can be a very busy time, and hot weather makes Tube travel a sweltering and sweaty nightmare. Air-conditioning is far from the norm in London, even in hotels; so although it rarely tops 90°F, it can feel much hotter. And festive shopping in central London just before Christmas borders on the insane.