What is it like to swim outdoors under a full moon in the depths of winter? Maria Hodson braves the inky waters of Clevedon Marine Pool with the Bristol Blue Tits to learn about what cold water swimming can do for you.

Contact the Plodcast team and send your sound recordings of the countryside to: [email protected].

If your letter, email or message is read out on the show, you could WIN a Plodcast Postbag prize of a wildlife- or countryside-themed book chosen by the team.

Visit the Countryfile Magazine website: countryfile.com

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