UK bids to host 2020 UN climate change summit

Chile and Costa Rica thought to be considering alternative bids after Brazil withdrew offer

Britain is bidding to host the UN climate change conference in 2020, the biggest since the Paris agreement was signed in 2015, as part of the government's aim to be seen as a green leader.

The conference will mark a vital deadline for countries to comply with their commitments on reducing greenhouse gas emissions and move on to tougher targets for the decade to 2030, and so it is likely to be a fractious affair.