Traffic outside Parliament has been brought to a standstill by protesting students who have taken the day off school for a climate change strike.

Schoolchildren are among those taking a stand with thousands of pupils walking out of class to demand immediate action.

Youth Strike 4 Climate movement organisers said strikes are taking place in 60 towns and cities, with youngsters carrying banners bearing slogans saying: "There is no planet B".

Huge turnouts at London and Brighton caused roads to be closed as the disruption continued into Friday afternoon.

In Parliament Square, two students brandishing a bottle of champagne climbed on to the roof of the number 11 bus to Fulham Broadway.

Traffic around the square in central London is at a standstill after students blocked traffic by sitting in the roads.