Prince Harry has issued a rallying cry to young people, telling them to look up from their phones and swap social media "likes" for changing the world.

The Prince, who surprised around 10,000 screaming fans during a WE Day convention for young people, urged the next generation to turn away from clickbait culture and fake news, as he promised to champion them in making their world a better place.

Saying he understood their frustration at the "entrenched mindsets" of their forebears over issues such as the environment, he urged them to abandoned "pessimism and cynicism" to move forward.