When Prince Charles married Lady Diana Spencer in 1981 millions of Britons partied in public. Far fewer were expected at street parties for Prince William's wedding on April 29th, not least because of the red tape that now snags public gatherings. David Cameron vainly told local authorities to "let people get on and have fun." Few prime ministers need to implore their people to party. More often governments are trying to stop them: the Afghan authorities have been considering a proposal to limit the boom in weddings, sombre affairs under the Taliban.
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