article_snippet.sent: Trainee lifeguards practise yesterday in Broadstairs, Kent, as pleasant weather continued on the south coast .
article_snippet.sent: Meanwhile safety charities warned people not to be tempted to swim in reservoirs or from unmonitored beaches during the warm weather.
article_snippet.sent: Some 400 people drown in the UK each year, the equivalent of one every 20 hours.
article_snippet.sent: In times of good weather drownings peak, charities said.