A 'multi-agency operation' has been launched.

18:28, Wed, Jun 24, 2026 Updated: 18:28, Wed, Jun 24, 2026

SNMissing 15-year-old last seen swimming in popular lake during heatwave has prompted a huge emergen

Police at the scene at Testwood Lakes Nature Reserve in Totton, Hampshire (Image: Ollie Thompson/Solent News)

A major search operation has been launched after a teenager went missing while swimming in a popular lake in Southampton.

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