It opens on May Day and then they all go off picking strawberries. Strawberries are never available at the beginning of May outdoors even in Kent.
Charlie uses a public phone box, presses his single coin into the slot and the phone at the end keeps ringing and is then answered. In the late 50s when this is set, the charge was 4d and therefore 4 coins were put in, and when the phone was answered, one pressed button A. If the call was unanswered, one pressed button B and received your money back.