The Number 10 news conference is just beginning.

Stay with us as we bring you the latest developments.

We are still waiting for the UK Prime Minister Boris Johnson to appear at No 10 for his news conference with Alok Sharma, president of COP26. It seems to have been delayed - we will bring you the latest as soon as we have it.

We're expecting to hear from Boris Johnson and Alok Sharma shortly.

The UK PM and COP26 President are due to give a news conference from Downing Street from 17:00 GMT. Stay with us for the latest.

Our science editor David Shukman has been reporting on climate change for nearly 20 years. This was his 10th and last COP summit as he steps down from the role.

In what he describes as his last piece to camera for the BBC, he thanked all the colleagues he had worked with over the years.

As we reported earlier, UK Prime Minister Boris Johnson and COP26 President Alok Sharma are due to hold a Downing Street news conference at 17:00 GMT on the outcome of the climate summit.

The PM is expected to give his reaction to the Glasgow climate pact deal which was struck last night - we'll bring you all the latest developments as they happen.

Reality Check

Image source, Getty Images

In one of COP26's first deals - about 100 world leaders pledged to end and reverse deforestation by 2030.

Forests absorb vast amounts of carbon dioxide (CO2) - a major contributor to global warming - so cutting down trees can have a big impact on climate change.

The UN says 420 million hectares (one billion acres) of forest have been lost since 1990. Agriculture is the main reason for this.

There have been efforts to protect forests before.

In 2014 the UN announced a deal to halve deforestation by 2020 and end it by 2030, external.

Then, in 2017, it set another target to increase forested land by 3% worldwide by 2030.

But what progress has really been made?

As a new global climate deal is struck in Glasgow, Californians worry about unprecedented drought and heat, combined with bad land management, which have culminated in wildfires of historic proportion in California.

Nichoel lost her home to the catastrophic Dixie Fire, and towns across the area have been wiped off the map. What's more, some of the largest and oldest trees on Earth - the giant sequoias - are now under threat.

Georgina Rannard
BBC News

Image source, Edwin Mumbere

Edwin Mumbere, 29, in Uganda lives in the shadow of the Rwenzori mountains where glacial melt and flooding is putting rural communities at huge risk. He works with communities to bring solar power and educate them about climate change.

He tells me on the phone that the Glasgow deal is disappointing for Uganda and for Africa.

“Real solutions have not been put in place despite us proving to them that climate change is real.”

He says it does nothing to support the 100,000 people in the communities he works in. In Glasgow, “they talked about funds to support those facing climate challenges but not the problem of gas emissions.

"More fossil fuel projects are being set up for oil exploration across Africa and we all know that Africa contributes to less 10% of global carbon emissions.”

“Pledges are being made and the same countries are also investing in projects that are seriously increasing the carbon emissions - it’s truly a double standard,” he says.

Image source, Getty Images

Tackling climate change will make flying more expensive, says the boss of the world's second biggest airline.

"Over time, it's going to cost us all more, but it's the right approach that we must take," chief executive of the Delta airline Ed Bastian tells the BBC.

Aviation is responsible for about 2.5% of the carbon emissions that are warming the planet, according to the International Energy Agency.

Critics argue the best way to reduce them is by flying less.

Atlanta-based Delta says that after spending $30m (£22.4m) a year on carbon-offsetting it has been carbon neutral since March 2020.

It has also pledged to spend $1bn over the next decade to cancel out all the emissions it creates.

More fuel-efficient planes, sustainable aviation fuels and removing carbon from the atmosphere are some of the ways it hopes to achieve this.

Read more

If this is all leaving you worried about the future, here are some tips on how to reduce your carbon footprint right now:

• insulate your home, installing a heat pump and/or turn down the heating
• cut out food waste and cut down on red meat
• drive less and fly less
• think before you buy, eg. clothes which can have a huge environmental impact

Read more about those and other tips here.

Here's a summary of what we've been hearing from the main players since the summit closed on Saturday night and the mixed reaction about its outcome.

Image source, PA Media

The deal reached at the COP26 summit last night is a "huge step forward" with the unprecedented inclusion of a coal pledge, the UN climate chief has said.

Earlier, Patricia Espinosa told the BBC's Andrew Marr Show she welcomed the historic - if watered down - move against coal, describing it as a "very difficult issue".

She said: "I would like to underline that the huge step forward in our negotiations was the fact that for the first time in this context we mentioned coal and fossil fuels."

She emphasised that there are "millions and millions of people that depend on fossil fuel industries" and- many vulnerable and poor people that also depend on it as a source of energy.

"On the one hand, we have clarity that this is a very big source of emissions and we need to get rid of that.

"On the other hand, we need to also balance out the social consequences for so many people around the world, especially in the poor countries."

What's been happening so far today?

We've been getting reaction to the deal struck at COP26 in Glasgow last night, and there have been some mixed views on what has been achieved:

• COP26 President Alok Sharma says he wouldn't describe the deal which included a last-minute change to "phase down" - rather than "phase out" - coal as a failure, but a historic achievement
• However, he says that China and India - which pushed for the change - would have to explain themselves to climate-vulnerable nations
• UN climate chief Patricia Espinosa says the deal - and the fact it mentions coal at all - is a huge step forward
• But activists and NGOs have expressed disappointment and speak of failed expectations when it comes to the deal

• In the past half hour it's been confirmed that UK PM Boris Johnson will hold a news conference later on Sunday to give his reaction to the deal

Some news just coming in this afternoon - UK Prime Minister Boris Johnson will hold a news conference at Downing Street at 17:00 GMT, following the conclusion of the COP26 climate summit, No 10 has said.

The PM is expected to give his reaction to the Glasgow Climate Pact deal which was struck last night - alongside COP26 President Alok Sharma.

Image source, Reuters

We've been bringing you reaction today to the the deal agreed last night - here's a reminder of what is in the Glasgow Climate Pact:

It includes:

• Countries asked to republish their climate action plans, with more ambitious emissions reductions targets for 2030, by the end of next year
• Emphasis on the need for developed countries to increase the money they give to those already suffering the effects of climate change, beyond the current $100bn annual target
• An increase - though not a doubling - of funds to help poorer countries with the adaptation to climate change
• Language about coal included for first time ever in a global climate deal
• But a pledge in a previous draft to “phase out” coal is instead watered down to a commitment to "phase down"

You can read more about what was agreed at COP26 here.

Laura Foster
BBC News

Before the climate summit even began, there had been complaints about how much accommodation cost in Glasgow during the two-week conference.

To ensure this didn’t stop activists and delegates from poorer countries from attending, a COP26 Homestay network was created - where people in Glasgow opened up their homes to scientists, activists and non-government organisation workers to help them keep costs low.

But what have they learned from each other?

Solemi Hernandez - a single mother based in the USA, but originally from Venezuela - was the guest of Andy Cakebread.

He chose to sleep on his sofa, so Solemi and her colleagues could get a decent night’s sleep in beds.

"What they’re doing is important. The whole world needs to be here to have their voice heard," Andy says.

"And so what sacrifice is it to spend a few weeks on a sofa?"

He says Solemi has inspired him to be more active in the climate movement.

"If I’d rented a room at a market rate or something, I wouldn’t have met the same kind of person."

Solemi says the experience has been amazing and should be done at future COP events.

"He collected us from the airport. He cooked for us. I loved walking his dogs.

"And I’ve learned to appreciate 'hot beer'."

And by that she means ale.

Alok Sharma has described the deal struck in the Glasgow Climate Pact as a "fragile win" after India and China pushed for the language on coal to change from "phase out" to "phase down".

As we reported earlier, the COP26 President said the two countries will have to "justify" their actions to nations that are more vulnerable to the effects of climate change.

He told BBC One's Andrew Marr Show that his role was to "build consensus" on the final deal - denying that the agreement had ended in failure.

Nobel Peace Prize Laureate Malala Yousafzai has said COP26 did not live up to climate activists' expectations.

The Pakistani activist took part in the summit virtually and pushed for climate education for children and girls.

"It was my expectation that the leaders would do something, but unfortunately they have not met the expectations of me and other climate activists," she told BBC One's Andrew Marr Show.

"I think leaders must prioritise people and the planet over profits in this moment.

"We know that climate change is not an issue in isolation, it's connected to gender equality and girls' education as well," she said.

Every year, some four million girls were at risk of missing out on their education because of events like floods and droughts, she added, quoting a report by her Malala Fund organisation.

Speaking a little earlier, Labour's deputy leader Angela Rayner said more must be done to limit rising global temperatures.

"We have made some progress and we have to acknowledge that. But we also have to acknowledge that we failed in getting that target of 1.5[C], and we must keep that pressure on because it will be catastrophic for areas of the world and for our planet, so we've got more to do," she told BBC One's Andrew Marr Show.

She also suggested the UK had "a responsibility to support the poorer countries" and criticised government policy on foreign aid.