Ukraine's President Volodymyr Zelensky is speaking alongside PM Rishi Sunak in Dorset, at the end of a surprise visit to the UK
Zelensky is asking for the UK to provide fighter jets to Ukraine - something Western allies have so far declined to do
Sunak tells the news conference that "nothing is off the table" and jets remain "part of the conversation"
"We have freedom, give us wings to protect it," Zelensky earlier urged a joint session of the UK Parliament at Westminster Hall
Defence Secretary Ben Wallace has been tasked with investigating what planes the UK may be able to provide, according to Downing Street
However the spokesperson stressed that this would be a "long-term" option
Zelensky also met King Charles earlier, who told him: "We've all been worried about you and thinking about your country"
It is Zelensky's first visit to the UK since Russia invaded his country, and his second international trip since the war began
That brings an end to our coverage of a busy day for both Volodymyr Zelensky and Rishi Sunak.
Today's page has been edited by Jasmine Taylor-Coleman, Sam Hancock and Jamie Whitehead.
It was written by Aoife Walsh, Thomas Mackintosh, Emily McGarvey, Richard Morris and Chas Geiger.
Thank you for joining us.
Russia's embassy in London has warned the UK government against sending fighter jets to Ukraine, saying this would have "military and political consequences for the European continent and the entire world".
WATCH: President Zelensky thanks Rishi Sunak, King Charles and Parliament
Aoife Walsh
BBC News Live reporter
Image source, Getty ImagesAs we've been reporting, Prime Minister Rishi Sunak and Ukrainian President Volodomyr Zelensky gave a press conference a little earlier at a British Army base in Dorset.
It marks the end of Zelensky's hectic surprise visit to the UK - only his second trip away from his country since Russia invaded in February last year.
Here are the key takeaways:
It's been a busy day for Zelensky who arrived only this morning, albeit unexpectedly, in London.
After touching down at Stansted Airport, he was greeted by PM Rishi Sunak and taken to Downing Street where the pair held a conversation in private.
He then made a landmark address to MPs at Westminster Hall, before meeting King Charles at Buckingham Palace.
Zelensky's now thought to be heading to Paris where he'll meet French President Macron and German Chancellor Scholz.
We'll bring you a rundown of the key moments from the press conference shortly.
Image source, PA MediaThe press conference has now finished, but here's one of the final questions as we keep you updated.
The Sun's Harry Cole quoted Sunak saying Britain has led on training Ukrainian forces, and providing weapons and tanks.
But why won't the prime minister now send the Typhoon fighter jets that Zelensky needs?
Sunak told Cole he was "totally wrong" to suggest there had been any reticence from the UK. He added Britain had been the first G7 country to provide Ukraine with battle tanks. Now nothing is "off the table", but there are talks with allies about the best way forward in supplying future equipment.
Zelensky said he had heard the PM's "desire to provide fighter jets", but with Typhoons, it does not just depend on the UK.
He didn't realise it took three years to train a fighter pilot, but Ukrainian pilots have already been training for two and a half years.
Jonathan Beale
BBC defence correspondent
The day started with a commitment from the UK to help train Ukrainain pilots.
But following an impassioned plea by Zelensky for fighter jets themselves, that pledge gradually shifted.
The PM has now ordered the defence secretary to examine ways that the UK can provide Ukraine with fighter jets.
The RAF has a limited number of aircraft it could theoretically provide Ukraine - including about 20 older Typhoon jets.
However, there is a danger that that Britain is writing checks that it will struggle to cash.
The RAF is already facing a backlog in the training of its own fast jet pilots, maintenance and upkeep of older aircraft is also more difficult.
Even the prime minister has admitted that if Britain does supply fast jets, it will be for the longer term not the near future.
The PM is asked by Sky News about a lag in providing Ukraine with more sophisticated weaponry, asking what is holding the West back.
The PM reiterates that the UK has led in terms of provision for equipment for Ukraine, whether it is armoured vehicles or artillery guns.
He continues, saying: "We are training combat aircraft for the first time. That is something we want to continue to do more of, to make sure Ukrainian armed forces are trained on Nato equipment. Challenger tanks will be on the battlefield in a matter of weeks."
Zelensky says he's grateful to the US for HIMARS, a light multiple rocket launcher, but warns that supplies are "running out" and there'll be "stagnation" in the war if this continues.
The next question comes from Natalia, a journalist with the BBC's Ukrainian service. She starts her comments in Ukrainian, before getting up and receiving a hug from Zelensky, who goes on to joke that he needs better security.
Once he's back at his podium, she directs her question at Sunak, asking him what can happen when London remains a city that is laundering Russian money.
The PM says there are "very immediate needs" to provide air defence for Ukraine. "Rest assured, we are here with you, with your people," he says.
"I used to be the finance minister, and we put in place probably the most extensive and forward leaning sanctions of any country" at the start of the conflict, he continues, saying he believes the UK is leading the way in sanctions.
Image source, PA MediaA reporter asks Sunak if he can provide absolute clarity on whether Ukraine will get fighter jets from the UK – and if so, when?
Sunak responds by saying the UK's "been very clear when it comes to the provision of military assistance to Ukraine and nothing is off the table".
He goes on: "When it comes to fighter combat air force, of course they are part of the conversation... that's why we've announced today that we'll train Ukrainian air force on Nato-standard platforms."
Zelensky adds that Ukraine needs a lot of equipment, and that those needs depend on the situation on the battlefield.
Image source, PA MediaZelensky continues his address, in Ukrainian, saying via a translator that talks today have been "very fruitful".
He extends his gratitude to Sunak, before thanking the people of Great Britain in showing a "willingness to help" his country.
Now it's time for questions from the media.
In response, Zelensky says he and Sunak have been putting the final touches to their negotiations on defence issues.
He says he can't share all the details of what has been discussed today, but he's "deeply grateful" to Sunak for understanding Ukraine's needs and for strengthening the partnership between the two countries.
Zelensky thanks King Charles, whom he met at Buckingham Palace earlier, as well as the MPs who gave Ukraine their support at Westminster Hall.
Image source, ReutersIn the coming days, Sunak says, it will be a year since the "needless" and "unprovoked" invasion of Ukraine by Russia.
He says this milestone is only convincing the UK to go "further and faster", which he adds the country will do.
The UK "will always be by your side," Sunak tells Zelensky, adding the country is a "staunch and unwavering friend".
Sunak adds that his government is accelerating the delivery of military equipment to ensure it arrives in weeks – not months or years.
As previously announced, Sunak says the UK is expanding its training programme to marines and fighter jet pilots.
Sunak continues, saying Ukrainian men and women are learning to control Nato-standard weapons, adding: "The dedication, courage and determination is a credit to you and your country."
He says Ukraine's incredible strength and bravery will ultimately defeat tyranny.
"That's why we're training and arming them with the equipment they need to push back Russian forces," the PM says.
Sunak starts by saying it's a privilege to stand next to Zelensky.
He says 10,000 soldiers have made the journey to the UK for military training, and just days ago dozens more arrived for training to operate the Challenger 2 tanks.
The PM says the Ukrainian troops are "already mastering the driving", which he hopes will make a difference on the battlefield
Image source, PA MediaPresident Zelensky and PM Rishi Sunak have started their press conference. Stay with us for live updates on what they say.
You catch tune in by clicking the play button at the top of this page.
Image source, EPAWhile we wait to hear from President Zelensky and Rishi Sunak, it's been reported that they've signed a declaration of unity.
It's not yet clear what that means exactly.
We're due to hear more from the pair at a press conference shortly.
Two lecterns have been set up at the British Army base in Dorset where President Zelensky and PM Rishi Sunak are, suggesting we'll hear from the leaders fairly soon.
The pair will make a joint statement cementing the UK and Ukraine's partnership, Downing Street say.
We'll bring you live updates and analysis from the press conference when it starts, stay tuned.