Prince William is to stage a 'Children's Earthshot' in Mumbai after his eco challenge reached one million Indian pupils

William has discussed the forthcoming visit with George, Charlotte and Louis, and Kate is expected to join him next month. Fifteen teams of nine to 17-year-olds drawn from nine Indian states and Delhi have reached the final. Five champions will be named on November 17 at Mumbai's Museum of Solutions, each receiving $2,000 (£1,490) to bring their idea to life.

Pupil projects range from fixing a flooded playground to cleaning up the polluted Godavari River.

Earthshot boss Jason Knauf: the next generation 'is not waiting for the future to act'.

No other country has produced as many Earthshot winners and finalists as India.