The annual event is becoming more popular - with more than three times as many people taking part in London this year than last year.

这项年度活动正愈发走红，今年伦敦参与“无裤日活动”的人数是去年的三倍之多。

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The company also introduced four feature phones, from its new Asha series, aimed at emerging markets, at its annual Nokia World event in London.

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Next week at its annual Nokia World event in London, the company is widely expected to unveil some of its first Windows Phones to the world.

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The annual event will also move from the Grosvenor House Hotel in central London to the Roundhouse in Camden.

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