Leaders face challenges in bid to deliver 'successful' Cop26

Climate conference must react to the code red warnings of scientists if weather extremes are to be tackled head on

Flowers outside Lloyds of London in protest to demand the global financial system stops putting money into the use of fossil fuels. 

As the clock ticks down to the start of Cop26, the challenges facing efforts to deliver action to avert dangerous climate change are coming into sharp focus.

The summit, taking place in Glasgow from Sunday, has no global treaty to agree - unlike the last major UN climate conference in Paris in 2015.