Boris Johnson started his presser by saying the world had been 5-1 down on climate change but had clawed back a goal or two... and could go to extra time.

Sky's Beth Rigby continues the PM's football analogy, asking whether the "sad reality is, if China is not on the pitch, Team World is not going to be able to equalise. That is the elephant in the room, isn't it?"

Johnson says President Xi (and President Putin) decided not to attend the Glasgow summit on pandemic grounds, saying "you've got to respect that".

But he says the Chinese team are "very high level" and President Xi's absence "doesn't mean the Chinese are not engaging", citing their pledge to meet the net zero target by 2060 or earlier.

Emissions from China continued to rise in 2018 and 2019, and it is the world's biggest source of carbon dioxide, responsible for around 28% of global emissions.

But the PM says it's "key" that China wants its carbon emissions to peak by 2030 or before.

"The question is how much before," he says. "That's the issue. There's a world of difference between peaking in 2030... and peaking in 2025. That's where we're keeping the pressure up."

The prime minister is asked if the leaders of developing countries would share his optimism, amid claims that "the West got rich on lavish lifestyles" while developing countries are now being told they can't do that.

Johnson says it is only in relatively recent history that we have begun to understand the effects of 250 years of CO2 emissions.

He concedes that "we owe a special duty" to those developing countries and that is why the $100bn commitment to support them is so important.

"But other countries are going to have to do more."

Wealthy countries previously pledged $100bn (£73bn) a year to help poorer nations by 2020 but that target was missed, so richer countries are being asked to commit more money.

Developing countries tend to pollute less per head of population and are not responsible for most emissions in the past - but they experience some of the worst effects of climate change.

They need money to help reduce their emissions and to cope with climate change.

Questions from the media for Boris Johnson now, and first up is the BBC's political editor Laura Kuenssberg.

Carrying on a football metaphor from the PM, she asks who or what will score those extra goals the world needs?

In response, Johnson says:

• There's been "big moves" on tackling deforestation
• India's pledge to move to decarbonise its power system and move towards renewables is "huge and terrific"
• Japan's promise to give $10bn to overseas decarbonisation projects over five years is "big money" which will help foster confidence from other nations
• We are starting to create "coalitions of support" to help countries that find it most difficult to transition away from fossil fuels to do so

Image source, Reuters

As the world leaders leave the conference, negotiators will now take over to thrash out the details of each nation's climate pledges.

Boris Johnson says his message to these negotiators is very simple: "The leaders of the world may have left... but I can tell you that the eyes of the world... are on you."

Boris Johnson points out that when the UK was selected to host COP26, just 1% of the world's economy had met the post-Paris obligations to improve on their 2030 emission targets - that figure is now 80%.

Bigger targets are being put forward but, more importantly he says, countries are putting forward plans to meet those targets.

"Billions of dollars have been committed to supporting developing and vulnerable countries" and big business has stepped up, he adds.

Image source, PA Media

Prime Minister Boris Johnson says he is "cautiously optimistic" about how the climate talks are progressing - but warns of a "very long way to go".

Taking stock after two days of talks with around 120 world leaders, he says there's no doubt that some progress has been made.

But he warns that it's all too easy to get caught up in a mood of "exaggerated enthusiasm".

"We must take care to guard against false hope," he says.

The UK prime minister and host of the climate conference is speaking to reporters before he and other leaders leave Glasgow.

We'll bring you the latest here.

Image source, Getty Images

Meanwhile, it seems President Joe Biden's trip back to his Edinburgh base from Glasgow was quite an eye-opener.

According to a White House report (brought to you by the BBC's North America correspondent Jon Sopel) one local dropped literally everything to grab a photo.

The report says: "At one point when we were still on smaller country roads, a large, naked Scottish man stood in his front window taking a picture of the motorcade with his phone."

Image source, Reuters

While we wait to hear from Boris Johnson, here's what Prince Charles had to say earlier at the summit.

He said the world has had enough of talking and "we need to put our words and commitments into practice".

In a speech to delegates about steps needed to protect the world's forests and land, he said nations needed to "honour" the rights of indigenous people who were "experienced custodians" of their habitats.

Charles, who is the heir to the throne, said: "I cannot believe how many times I've ended speeches like this all over the world during the past 40 years - and to no avail.

"But I can only pray that this time, this session will provide us with a real sense of the seriously urgent systemic shifts that need to happen."

Image source, Reuters

The prince, wearing a gift of a colourful necklace, walked into the auditorium with a delegation of indigenous people from the Global Alliance of Territorial Communities, representing 24 countries with tropical rainforests.

Before his speech, he told Juan Carlos Jintiach and Tuntiak Katan from Ecuador: "We've got to work harder to save your forests, for all our sakes."

We're expecting to hear more from UK Prime Minister Boris Johnson in Glasgow shortly.

His press conference is due to get under way at 17:00GMT. We'll bring you any updates.

Image source, Getty Images

We've been telling you how delegates are learning about the carbon footprint of their meals inside the summit venue.

But here's a flavour of what presidents and their entourages like to eat when they nip out for a takeaway.

Staff at the Piece sandwich shop in Finnieston, close to the SEC in Glasgow, say Colombian president Iván Duque Márquez’s security team turned up at lunchtime.

They ordered 20 sandwiches, including the shop's best-selling chicken Bahn Mi - a Vietnamese baguette made up of roast chicken, Asian slaw, pickled chillies, coriander and sriracha.

Apparently, the president himself ordered a salad, although he didn’t venture into the shop…

Image source, Google

Image source, Getty Images

As we reported earlier, delegates dining at COP26 are learning about the carbon footprint of their meals on each of the conference menus.

A plant-based croissant, for example, is listed as having a slightly bigger carbon footprint than a bacon roll. No ingredients were listed so we're not sure what the pastry-based delight contains instead of butter, or why its carbon footprint is as high.

• What's your diet's carbon footprint? Find out here

The BBC's chief political correspondent Adam Fleming put the croissant finding to French minister for ecological transition, Barbara Pompili.

"A croissant is so good," she says. "But it is fat and it's not the best carbon footprint.

"So I think we have to eat croissants because they are good but just a little bit less than other breakfasts."

You heard it here first folks.

Image source, EPA

Back at the summit, the Duke of Cambridge is addressing a session to introduce the winners of his Earthshot competition, a new annual award to recognise people trying to save the planet. (The winners are listed here).

He says their ingenuity is amazing and their potential is "off the charts".

The finalists should be a cause for optimism, says Prince William. They represent a growing wave of innovators dedicating their time and talent to finding solutions to save the planet, he says.

He calls on those gathered at the conference to help to create the conditions in which the innovators can thrive and their ideas can scale.

He finishes by introducing Vinisha Umashankar, a 15-year-old from India and inventor of a solar ironing cart with the potential to improve air quality by replacing charcoal with solar power for millions of street vendors.

"She puts us all to shame," he adds.

Image source, Reuters

So why does methane matter?

Methane is responsible for a third of current warming from human activities - and it's one of the most potent greenhouse gases.

Levels of methane in the atmosphere are continuing to rise.

How is it emitted?

Cows may spring to mind... but rice production and rubbish dumps are also to blame. Around 40% comes from natural sources such as wetlands, but the majority is now due to human activity.

One of the biggest sources is from the production, transport and use of natural gas. And since 2008 there has been a big spike in methane emissions, which researchers believe is linked to the boom in fracking for gas in parts of the US.

How does it compare to CO2 in terms of greenhouse activity?

Over a 100-year period it is 28-34 times as warming as CO2. And over a 20-year period it is around 84 times as powerful per unit of mass as carbon dioxide.

But there's much more CO2 than methane in the atmosphere and individual molecules of CO2 can stick around for hundreds of years.

As we've been hearing, a host of countries have pledged to cut methane emissions by 30% by 2030.

A total of 103 countries have now signed up to the pledge, but major emitters like Russia, China and India are not part of it.

The greenhouse gas accounts for about half the global warming we're experiencing today, US President Joe Biden tells his counterparts.

Watch him talk through the plans to cut emissions:

Michael Bristow
BBC World Service Asia Pacific editor

Image source, Reuters

The BBC has learned that COP26 organisers would not allow the Chinese President, Xi Jinping, to address the conference by video link.

The incident underlines the difficulty of bringing world leaders together to solve the crisis.

The UK, which is hosting the summit, believed it was critical for world leaders to attend the conference in person.

President Xi, however, has not left China since the Covid pandemic took hold, and declined to attend. Instead, he expected to appear by video link.

But the meeting organisers only gave him the option of providing a written statement, which he supplied.

For many, it seemed a small contribution from the world's biggest emitter of greenhouse gases, particularly as the statement contained no new pledges.

The conference organisers issued a statement suggesting some frustration at China's approach.

Angus Foster
BBC News Climate and Science editor in Glasgow

China has pushed back against calls for the UN climate conference in Glasgow to aim to limit global temperature rises to 1.5C.

The country's top climate negotiator, Xie Zhenhua, said the higher rise of 2C agreed under the 2015 Paris Agreement had to remain up for discussion.

"If we only focus on 1.5, we are destroying consensus and many countries would demand a reopening of the negotiations," he said.

This is a restatement of China's long-held position, but it underlines the drag it could have on other countries' calls for more ambition.

Under the Paris Agreement, countries agreed to limit temperature rises to "well below" 2C, and "pursue efforts" to restrict them to 1.5C - compared to pre-industrial times.

At the World Leaders Summit under way in Glasgow, many countries have appeared to only concentrate on the 1.5C target, even though that could mean more accelerated transitions for countries like China.

Xie said both targets were still needed.

"The world already has a consensus. We need to be realistic, pragmatic, and focus on taking concrete actions," he said.

Xie was giving his first - and probably only - press conference of COP26. He was brought back from retirement by China's President Xi Jinping to oversee the country's climate negotiations. Since Xi decided not to attend the conference himself, Xie is the closest we may get to understanding the Chinese leader's position.

In the lead up to the conference, some analysts wondered if China would use more ambitious climate change targets to stake its leadership of the non-Western world on climate and other issues.

But Xi Jinping’s decision not to travel to the conference dented those hopes, and China's climate promises have not been updated for more than a year.

Asked if China was now behind the curve in terms of ambition, Xie insisted existing targets were “very ambitious”.

“Our goal is to peak our emissions of CO2 by 2030 and be carbon neutral by 2060,” he said. “That's a huge difference, it's already ambitious."

Image source, Getty Images

Back in Scotland there have been more climate protests in both Glasgow and Edinburgh as activists take to the streets.

About 200 Extinction Rebellion demonstrators are outside the Glasgow offices of investment bankers JP Morgan.

An earlier demo took place outside the financier's Edinburgh centre.

The group say they want the company to stop funding fossil fuel projects.

Many different groups from around the globe are wanting to make their voices heard as the world's attention falls on Glasgow during COP26.

Image source, Getty Images

Image source, PA Media

Rebecca Henschke
Asia editor, BBC World Service

In Brazil and Indonesia home to some of the largest tropical forests in the world, there’s concern in indigenous communities about how this forest deal will be implemented.

“To fulfil their mission and avoid a climate catastrophe, they must work with us to protect the world’s last remaining tropical forests,” says Mina Susana Setra, from the Alliance of Indigenous Peoples of the Archipelago (AMAN) in Indonesia.

Leaders, she says, must stop global companies from "bulldozing our ancestral forests".

Environmentalists in Indonesia are also warning that the deal to end deforestation by 2030 will mean little unless it’s binding.

“What has been agreed in Glasgow has no relation to what is happening on the ground in Indonesia at the moment,” says Forest Watch Indonesia (FWI) executive director Mufti Barri.

“If the government was serious about protecting forests then they would not be making it easier for companies to exploit and clear them.”

Despite huge protests the Indonesian parliament passed a sweeping pro-business law last year that removes a number of environmental protections.

And in September a ban on new palm oil plantations that has been in place since 2018 expired and has not been extended. Oil palm plantations are a key driver of deforestation in Indonesia.

“Implementation of this deal will be key,” says Greenpeace Indonesia’s Leonard Simanjuntak.

Roger Harrabin
BBC environment analyst in Glasgow

Image source, PA

An initiative to turbo-charge the uptake of clean technologies has been launched at COP26 by the UK prime minister alongside representatives from the USA, India, EU, and - importantly - China.

More than 40 leaders have pledged to work together to scale up clean solutions, by imposing worldwide standards and policies.

The aim is to give investors certainty that global markets will be created for low-carbon, or even zero-carbon, technologies.

It’s hoped eventually the initiative will help draw in trillions of dollars in private finance for cutting emissions.

The plan will start with five high carbon-emitting sectors: steel, road transport, agriculture, hydrogen and electricity.

Similar international attempts have been made previously to push clean tech – but nothing as ambitious as this multi-lateral agreement.

The initiative, known as the Glasgow Breakthroughs, was applauded by Nick Mabey from the climate think tank e3g.

He told me: “This potentially has real muscle. It takes climate change out of the negotiating halls and into the real economy.