Nearly two thousand people took the plunge at a mass participation swimming event in Kent.
The Medway Big Splash took place at Medway Park in Gillingham and Strood Sports Centre.
Guest of honour was Olympic diver Blake Aldridge.
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Thursday's weather for the west of the region
Thursday's weather for the east of the region
The RMT union has accused Southern of inventing figures which the company claims show record numbers of guards are going sick.