Blue Lagoon, Arlesley, Bedfordshire

The Blue Lagooners club run three sessions per week during the summer months, where the exact start and end dates are determined by the temperature of the water. They are Wednesdays 18:00-20:00 and Saturdays and Sundays 08:00-10:00.

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Sessions costs £3 for members and £10 for non-members, with wetsuit hire coming in at £4.

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www.bluelagooners.com