Four people were rescued from a blizzard on Scotland's highest mountain earlier this week - thanks to a free mobile phone app.

It is called What 3 Words - a new system to identify people's exact locations.

Al Jazeera's Jessica Baldwin reports from Pembury, England.

Code: SAVOO06. Folge diesem Link und erhalte mit dem Code einen JD Sports Gratis-Versand-Gutschein.

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