It's been another long day for negotiators. Here's a round-up of what happened:

• It was meant to be the final day of negotiations. But as expected, the 18:00 GMT deadline was missed, and negotiators continued to work into the night debating the intricate details. Another plenary meeting won't be held tonight, which means we won't see the next draft text until tomorrow morning around 08:00
• A new draft agreement was published Friday morning, leading to criticism from many countries and activist groups. It weakens some of the language from an earlier draft on the phasing out of coal and fossil fuels, but strengthens other sections - including calls for nations to set climate targets

• A long stocktaking session was held, where nations shared their thoughts on how the talks are going. There was an overarching feeling from most countries that more needs to be done
• There were particularly strong messages from island nations, such as Tuvalu, whose representative said: “It is a matter of life and survival for many of us"

• Environmental campaign group Greenpeace released balloons inside the summit hall reminding delegates that the Earth is "not for sale". They accused energy lobbyists of trying to "greenwash" the conference
• Some delegates walked out of the talks to join climate activists outside the venue, chanting "power to the people"

• Scottish police are investigating after tyres on SUVs were slashed in Glasgow by a group trying to draw attention to the high level of emissions from these vehicles

Image source, Getty Images

Image source, Getty Images

The negotiators have spent another day hammering away at a draft deal, but the summit doesn't close until COP26 president Alok Sharma does some hammering of his own - with a gavel that is.

But that doesn't happen until every single party has agreed to the binding resolution - hence today's overtime.

What's happening right now?

It's late on Friday night in Glasgow now, and negotiators from 197 parties - that is, countries and blocs such as the EU - are probably hoping to get some rest before starting again bright and early on Saturday morning. It's been announced that there will be no more plenary meetings this evening.

We've seen two drafts of an agreement so far, and are expecting a third. But this doesn't mean an agreement has been reached, as parties can still ask for amendments to be made.

In short, it's not over until it's over - when that gavel comes down.

What are the key issues?

The overarching goal is to figure out a way to keep global temperature rises below 1.5C from pre-industrial levels by 2100.

But there are some sticking points, particularly around money.

The most recent draft has also, compared to a previous draft, strengthened calls for countries to tighten their climate targets - but it's watered down language around fossil fuels.

For example, the text on phasing out coal now talks about phasing out "unabated" coal, and references to ending subsidies for fossil fuels now specify "inefficient" subsidies for fossil fuels.

UN Secretary General António Guterres told AP news agency that the 1.5C target was on "life support" - and climate scientists have also warned that, based on the pledges already made, we're likely to overshoot. Earlier this week the scientific research group Climate Action Tracker said we were on track to hit a rise of 2.4C.

Why does it matter?

Climate change is directly linked to extreme weather events, such as wildfires and flooding. Developing countries are at the greatest risk.

With extreme weather causing widespread destruction that makes resources scarce, climate change has also been linked directly to conflicts and mass migration movements.

If we exceed the 1.5C goal, island states in particular warn that they'll be at risk of being completely submerged in water. Earlier in the summit Satyendra Prasad, Fiji's ambassador to the UN, said: "Beyond 1.5 we cannot imagine a future. It is not a number for negotiation."

Cop26 President Alok Sharma has just confirmed that there will be no new text released tonight, and that talks will continue tomorrow once a new draft agreement is circulated among parties.

In a message to delegates, Sharma said he and his team are "engaged in intensive consultations" with all parties "in an effort to reflect the views expressed, find the right balances and develop texts that will have been built collectively."

Sharma also said that the revised documents of the deal will be distributed overnight as talks continue, and will be available by 08:00 GMT tomorrow.

Sometime after 10:00 the parties will meet for another plenary meeting to discuss the drafted documents and "the state of the negotiations".

Sharma added that he expects the conference to "adopt decisions and close the session" by Saturday.

Image source, AXEDRAX

A protester climbed on top of a train near a power plant in North Yorkshire, England, earlier on Friday.

The Axe Drax campaign group said one of its activists “halted the train”, which was carrying wood pallets and heading to Drax Power station.

Images on social media show the activist waving a flag bearing the Extinction Rebellion logo. The incident comes as the COP26 climate change in Glasgow draws to an end.

Drax is the largest emitter of carbon dioxide in the UK.

The facility has said it is phasing out coal burning and is the largest biomass-fuelled power station in Europe and gets green energy subsidies from the government. It has been approached for comment.

Read more here.

Consensus can come quickly - or not at allpublished at 20:23 Greenwich Mean Time 12 November 2021

20:23 GMT 12 November 2021

Justin Rowlatt
BBC News climate editor

The fact that most COP climate summits have gone into overtime shows the immense challenge that the negotiators face.

There are hundreds of "square brackets" marking contested words in the draft document.

That means some gruelling discussions for the already sleep deprived delegates.

But don’t imagine that progress isn’t possible.

Veterans of these conferences say consensus can sometimes be reached surprisingly quickly.

But the caveat is always the same: it happens sometimes, but not always.

Image source, Getty Images

On the final day of COP26, Greenpeace activists have staged a protest inside the summit hall.

Protesters released balloons bearing a sign saying "not for sale", which floated up towards the massive iconic globe that hangs from above.

In a statement, Greenpeace International executive director Jennifer Morgan said the summit "is yet to meet the moment".

"Hundreds of fossil fuel lobbyists are here and their fingerprints are all over this conference," she said.

"They want to buy their way out of responsibility for the climate crisis, this place is flooded with greenwash and we’re here to say our planet is not for sale.”

Glenn Campbell
BBC Scotland Political Editor

Scotland’s first minister, Nicola Sturgeon, says she is “cautiously optimistic” about the outcome of the Glasgow climate summit.

She says there are signs a deal is “inching forward” in the right direction as negotiations continued beyond the 18:00 GMT deadline.

There have been “big concessions” this afternoon, Sturgeon adds, including from the United States on adaptation funding - preparing for extreme weather events or building seawalls, for example - for developing countries.

Some nations were still pushing for more on curbing temperature increases to 1.5C and on compensation for loss and damage caused by climate change, she adds.

The first minister tells BBC Scotland the final agreement would depend on the political will, determination and leadership that is shown in the hours ahead.

Image source, Getty Images

One person per second around the world is displaced by extreme weather events, according to a climate adviser to the UN High Commissioner for Refugees - in addition to those affected by conflict or long-term climate issues.

"We've got tens of millions of people who are on the front lines of the climate emergency and are looking at COP26 in disbelief... and asking 'where is the action?'," Andrew Harper told the BBC.

He said climate-influenced migration can see people needing to move because of crops failing when they cannot deal with increased heat or as a result of competition over scarce resources.

But the migration caused by this does not see people leave the poorer countries, Harper adds.

"When people get displaced they generally don't cross borders unless there's no other alternative. The vast majority of people who move tend to do so internally, within their own countries, so that's where we need to provide the support."

• Extreme weather: What is it and how is it connected to climate change?

As talks at COP26 in Glasgow extend past their Friday evening deadline, millions of people around the world may be wondering what a new deal would mean in their daily lives.

There are several ways in which decisions made at COP26 would impact the lives of the world’s citizens, ranging from a widespread shift towards electric vehicles and renewable energy, to more solar panel equipped homes and green spaces in towns and cities.

A deal might also impact people’s wallets. Efforts to cut down on deforestation, for example, may lead to more expensive foods.

“Consumers will inevitably have to absorb some of these costs if we want to deliver on the COP26 declaration – by paying more and consuming less,” Toby Gardner of the Stockholm Environmental Institute tells the BBC.

If businesses don’t try to reduce the emissions of their goods, prices may also go up.

A drive to net zero may also yield benefits such as cleaner air, quieter streets and improved mental health.

“Delivering a just, net zero transition should ultimately result in happier, healthier lifestyles,” says Matthew Hannon from the University of Strathclyde.

“The question should therefore be less about what I will lose under net zero and more about what I could gain?”

Image source, Getty Images

We've heard a lot today about the funding developing nations need to tackle climate change. Poorer countries are the ones that will be most acutely impacted by climate change, but richer nations are responsible for most historic emissions.

So what is climate finance, and why is it important?

As long ago as 2009, the developed world pledged that it would mobilise $100bn (£72bn) a year by 2020, and subsequently every year after that, for poorer countries, to help:

• deal with the effects of climate change
• build greener economies in the future

But this target has still not been achieved and the UK government, which is hosting this summit, now says it’s unlikely to be until 2023. For many countries, this is the biggest issue to resolve - and the very poorest are demanding action at this summit.

Mohamed Nasheed, the former president of the Maldives, said: "To provide confidence and momentum going into COP26, the $100bn climate finance goal must be met immediately, not in 2023.

So who isn’t coughing up?

It is estimated that by 2019 the figure had reached just over $79bn, only a small increase on the previous year. We don’t have the exact numbers for 2020 yet but it’s understood to still have been shy of the target.

Of the rich countries, Germany, Japan and France have paid the most. The UK and Canada are slightly behind them - but the two big laggards are the United States and, in particular, Italy.

President Joe Biden has promised to double the amount of money the US is providing, but the message from the world's poorer countries is pretty simple - if you want ambitious climate targets, you are going to have to pay for them.

Read more: How much is the developing world getting to fight climate change?

We're likely to be here into the weekendpublished at 18:40 Greenwich Mean Time 12 November 2021

18:40 GMT 12 November 2021

David Shukman
Science editor, BBC News, Glasgow

I think it's very likely there will be an agreement - but what no-one can tell is when it will land.

By the standards of previous conferences of this type the likelihood is it will run into the weekend - certainly tomorrow, given the complexity of the negotiations.

An additional problem is, because national interests are at stake, very often what happens now is that delegations have to consult their capitals, to check what they can agree to.

Of course, that adds more time. I think that's particularly the case for the big coal-producing countries. Will they tolerate, in the final agreement when we get it, a line that talks about phasing out coal?

Now it is possible that there could be some miraculous surprise in the coming hours and everything gets sewn up during the course of this evening. But the likelihood is they are going to have to carry on through the night, judging by the statements the delegates have been making in the last few hours.

Nathalia Passarinho
BBC Brasil

Brazilian negotiators tell me that the draft agreement as it is now is "unbalanced".

They say developed countries want efficient mechanisms to monitor emission targets, but do not accept the same level of monitoring for finance.

Brazil, Paraguay, Uruguay and Argentina are pushing for the final agreement to include a committee to monitor the delivery of the $100bn per year that has been promised by developed nations for poorer countries.

They say there is progress in the part of the draft that calls upon countries to accelerate the transition towards "low-emission energy systems". The term "energy" was missing from the previous draft.

The latest draft also mentions accelerating the phasing out of “inefficient subsidies for fossil fuels”. But a negotiator criticises the addition of the term “inefficient”.

"This term is vague. What does inefficient encompass?" they asked.

As negotiations get to the sharp end, we've been hearing a lot about the 1.5C target.

Reducing emissions to achieve it is one of the key goals of COP26.

Scientists tell us that keeping the rise below 1.5C - compared with pre-industrial times - will avoid the most catastrophic impacts of climate change, but we're already at least 1.1C warmer so radical action is needed.

In 2015, world leaders agreed to keep global temperatures "well below" 2C above pre-industrial times and "endeavour to limit" them even more, to 1.5C.

But we are way off track from achieving that. On current plans, the world is expected to breach the 1.5C ceiling within decades and to hit 2.7C of warming by the end of the century.

Scientists say there simply isn’t time for inaction if 1.5C is to be achieved, while some believe we’ve already left it too late.

Helen Briggs
Environment correspondent in Glasgow

Image source, Getty Images

It appears there’s no end in sight to the negotiations with speculation among COP veterans turning to how long the talks might last.

These events are notorious for over-running, with some lasting into Saturday and beyond.

The 2019 summit in Madrid lasted into Sunday afternoon.

Those I’ve spoken to predict some fireworks to come, followed by at least one more draft of the text and things being wrapped up some time tomorrow.

And there was some relief when staff in the tea bar that has supplied us with sandwiches, lentil soup and Irn-Bru (a Scottish soft drink) for the past fortnight revealed they had been told to come in tomorrow.

Image source, Getty Images

The curtain was due to fall on COP26 at 18:00 GMT Friday. But as the hours have ticked by and negotiators have argued over individual words, it has increasingly looked unlikely that the deadline would be met.

One negotiator told us that her best bet was that delegates would still be trying to nail down a final agreement until late into the night, and possibly into tomorrow.

This is not unusual for COP summits, which have a history of running past the deadline.

COP president Alok Sharma has already twice postponed press conferences that were scheduled for Friday afternoon as negotiations continued.

It could be a long night...

The deadline to reach an agreement is supposed to be in 15 minutes, at 18:00 GMT, but it's highly unlikely that will be met - something that has happened at many other COP summits.

As the clock ticked down, UK PM Boris Johnson told world leaders "this is the moment" and they are in the "final furlong".

Speaking from London on Friday afternoon, Johnson said negotiators need to realise that the cover text is the deal and we need to "find a way of agreeing it or I'm afraid we risk blowing it".

He says he has been "shifting heaven and earth" to get people to see the vital importance of the agreement.

"We do need to see the cash on the table" to help the developing world make the changes necessary, he says.

Image source, Getty Images

A young climate change activist from Norway says there are more journalists at COP26 than young people.

Carl Dybwad told the BBC his biggest disappointment from COP is how important meetings have been open only to the countries involved and "one or two observers".

"[It's] just been very hard to bring forward our causes, we cannot fund or we cannot forward our causes of loss and damage, of reparations and of finance because we're not in the room", he said.

"We walk in the hallways where the average age is 55 years old in a way. And I think I'm most saddened by this."

Last week, young protesters gathered in Glasgow, including Swedish activist Greta Thunberg - to make their voices heard at the Fridays for Future march.

And earlier this week, former US President Barack Obama told young people to "stay angry" in the fight against climate change.

Simon Stiell, minister for climate resilience in Grenada, has told reporters that today's negotiations are critical.

Grenada is a Caribbean island nation that is particularly under threat from the effects of climate change - namely coastal storms, flooding and drought.

“We need to hold the line," he says. "We owe our children, our grandchildren. This is critical now. The next few hours are going to determine the new dawn.

“What is on the table is the bare minimum. I believe if we leave Glasgow with the principles that are outlined, the key tenets of the text as it stands now, we can say I believe we got the most we could have out of this COP.

“If the text that’s on the table now withstands the battering that it may get, yes we are holding on by our fingernails to 1.5C.”

Paul Rincon
Science editor, BBC News website

Image source, EPA

Sea level rise is one of the most damaging effects of climate change and poses an existential threat to many low-lying regions and islands. It’s an issue that many delegates at COP26 have raised to implore governments to cut emissions faster.

Why is it happening?

The oceans have risen by around 20cm (8ins) since the start of the 20th Century and are continuing to rise at a rate of 3.7mm per year.

There are two reasons global warming causes the ocean level to rise. As you heat up water, it swells to take up more volume - a phenomenon called thermal expansion. The other cause of sea level rise is additional water that's flowing into oceans from melting ice in Greenland, Antarctica and from glaciers elsewhere in the world.

How much sea level rise we'll see in future will depend on whether the amount of planet-warming gases we release stays the same, increases or decreases.

How bad could it get?

If the world drastically cuts emissions, reaching net zero by 2050, we could see about half a metre of sea level rise by the end of this century. This would still be damaging in some low-lying coastal areas, including islands in the Pacific such as Kiribati.

If greenhouse gas emissions were to increase substantially, global sea levels could rise more than 80cm by 2100. But there's also a nightmare scenario, which scientists admit is clouded with uncertainty, but remains an outside possibility. If the Antarctic ice sheet were to become unstable as a result of continued warming, it could add 2m to ocean levels.

That’s a terrifying prospect. With just 1m of rise, large areas of Miami, New York, eastern England and Bangkok would be at risk of inundation. , external

The bottom line

Even if we cut emissions significantly, we can't switch off sea level rise. If we limited warming to 1.5C, ocean levels would continue to rise over the next few centuries because of warming that's already happened.

Hundreds of delegates have walked out of COP26 negotiations to join a protest outside the venue.

Activists have been expressing frustration at a lack of results from the conference on its final day.

Members of environmental groups and trade unions have been among those singing "power to the people" as they leave the arena to join hundreds of protesters in the street outside the summit's blue zone.

The mood among campaigners turned sombre as speakers who had been in the summit addressed the crowd, including a 15-year-old from Chad who explained how Lake Chad has dried up by 95% since the 1950s.