To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video More than 350,000 people are living under a hosepipe ban as a heatwave warning is extended across the UK. Cambridge Water, said the temporary ban, which could see rulebreakers fined £1,000, would come into effect at 1am on Friday. They claim it would ‘help protect local water resources and the region’s internationally important chalk streams’. Managing director Elena Karpathakis told the BBC: ‘We have been doing everything possible to maintain supplies, but demand for water is currently at record levels. ‘So we really need your help please.’ Sign up for all of the latest stories Start your day informed with Metro's News Updates newsletter or get Breaking News alerts the moment it