Danone Waters has launched a Weatherman service for independent retailers comprising a weekly email detailing the week’s weather forecast as well as bottled water sales predictions.

The bottled water company describes the service as a "useful tool" that could make a massive difference to profits.

It says that taking 14°C as a base, when temp-eratures reach 20°C sales will typically rise by 36% and when it reaches 25°C sales will increase by 78%. If the temperature tops 30°C sales will typically increase by 125%. Retailers wanting to register should email danonewaters@publicasity.co.uk