More than 500 people braved the freezing temperatures on Saturday to take a dip in Windermere.
The aptly named Big Chill Swim was held for only the second time, but organisers hope to make it a key feature in the open swimming calendar.
Matthew Taylor reports.
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Some of us were treated to a spectacular view last night. You were out with your cameras and we were out with ours.
The company confirmed that tests were carried out controlled drugs went missing from a secure medical room onboard the vessel.