The Duke of York will abseil down the Shard skyscraper in London for charity today.
Other participants include Ffion Hague, the wife of Foreign Secretary William Hague, and leading businessmen and women.
The Shard is the tallest building in Europe, and its viewing galleries will be open to the public in February next year.
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Kim Wall, whose body had been cut apart, is believed to have died while on a privately built submarine belonging to a Danish inventor.
Parts of Scotland and northern England will start the day with outbreaks of thundery rain before it slowly clears through the day.