Hundreds of nude cyclists are to ride through Brighton. It's part of a worldwide campaign to raise awareness of the vulnerability of cyclists on the roads.
Naked riders are also being invited to make a triathlon of the day, with a naked fun run to start the day, and a post-ride skinny dip at Brighton's naturist beach.
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A ceremony has been held in Portsmouth aboard HMS Victory to mark the 212th anniversary of the Battle of Trafalgar.