Jesus Green Lido is one of the few remaining examples of the lidos that were built across the country in the 1920s and 30s. Opened in 1923 on the south bank of the River Cam, the Lido is Britain’s longest pool. In a special programme to mark the lido’s 100th anniversary, Julian Clover, Lucy Milazzo and Leigh Chambers find out what makes it such a popular Cambridge attraction.