BBC: Negotiators in Paris are again working through the night in an effort to secure a new global climate deal.
The French president of the meeting said the "conditions were never better" for a strong and ambitious agreement.
Laurent Fabius said he was confident of presenting the final draft early on Saturday morning.
The document will be assessed by participants before a final plenary meeting of all the parties to approve the deal.
Despite insisting throughout the conference that the deal...