tony blair uk election amanpour intv sot vpx_00000705.jpg
tony blair uk election amanpour intv sot vpx_00000705.jpg
Now playing
00:50
Former UK Prime Minister comments on Brexit: It's tragic
PHOTO: Isaac Abrack
Now playing
03:00
Hear from schoolgirl who escaped abduction in Nigeria
Now playing
01:32
Chuck Hagel: There have to be consequences for Khashoggi's assasination
UK police appealed for help Friday, Feb. 20, 2015, to find three teenage girls who are missing from their homes in London and are believed to be making their way to Syria.

The girls, two of them 15 and one 16, have not been seen since Tuesday, Feb. 17, 2015, when, police say, they took a flight to Istanbul. One has been named as Shamima Begum, 15, who may be traveling under the name of 17-year-old Aklima Begum, and a second as Kadiza Sultana, 16. The third girl is identified as Amira Abase, 15.
PHOTO: Metropolitan Police
UK police appealed for help Friday, Feb. 20, 2015, to find three teenage girls who are missing from their homes in London and are believed to be making their way to Syria. The girls, two of them 15 and one 16, have not been seen since Tuesday, Feb. 17, 2015, when, police say, they took a flight to Istanbul. One has been named as Shamima Begum, 15, who may be traveling under the name of 17-year-old Aklima Begum, and a second as Kadiza Sultana, 16. The third girl is identified as Amira Abase, 15.
Now playing
00:39
Shamima Begum loses legal bid to return home to appeal citizenship revocation
PHOTO: Obtained by CNN
Now playing
08:29
How a religious festival turned into a massacre
Saudi Crown Prince Mohammed bin Salman attends a conference in the Saudi capital Riyadh on October 2018.
PHOTO: FAYEZ NURELDINE/AFP/Getty Images
Saudi Crown Prince Mohammed bin Salman attends a conference in the Saudi capital Riyadh on October 2018.
Now playing
02:10
US intel report: Saudi Crown Prince responsible for approving Khashoggi operation
A Fijian rugby team serenaded workers in the Sydney hotel where they are quarantining.
PHOTO: Costa Argyrous
A Fijian rugby team serenaded workers in the Sydney hotel where they are quarantining.
Now playing
00:45
See Fijian rugby team serenade quarantine staff in Australia
Russian diplomats working in the Pyongyang embassy had to use a handcar as they returned home from North Korea with their family members.
In a video released by the Russian Foreign Ministry on Thursday (February 25) diplomats and their family members are seen pushing a handcar and cheering as they cross the bridge which serves as a demarcation line between the two countries.
PHOTO: Russia MOFA
Russian diplomats working in the Pyongyang embassy had to use a handcar as they returned home from North Korea with their family members. In a video released by the Russian Foreign Ministry on Thursday (February 25) diplomats and their family members are seen pushing a handcar and cheering as they cross the bridge which serves as a demarcation line between the two countries.
Now playing
02:38
Video shows Russian diplomats leaving North Korea on handcar
The Pentagon, the headquarters of the US Department of Defense, located in Arlington County, across the Potomac River from Washington, DC is seen from the air January 24, 2017.  / AFP PHOTO / Daniel SLIM        (Photo credit should read DANIEL SLIM/AFP via Getty Images)
PHOTO: Daniel Slim/Getty Images
The Pentagon, the headquarters of the US Department of Defense, located in Arlington County, across the Potomac River from Washington, DC is seen from the air January 24, 2017. / AFP PHOTO / Daniel SLIM (Photo credit should read DANIEL SLIM/AFP via Getty Images)
Now playing
05:24
US carries out airstrikes on Iran-backed militia groups
CATANIA, ITALY - FEBRUARY 18, 2021 - Mount Etna erupts in Sicily sending plumes of ash and spewing lava into air - PHOTOGRAPH BY Marco Restivo / Barcroft Studios / Future Publishing (Photo credit should read Marco Restivo/Barcroft Media via Getty Images)
PHOTO: Barcroft Media/Barcroft Media/Barcroft Media via Getty Images
CATANIA, ITALY - FEBRUARY 18, 2021 - Mount Etna erupts in Sicily sending plumes of ash and spewing lava into air - PHOTOGRAPH BY Marco Restivo / Barcroft Studios / Future Publishing (Photo credit should read Marco Restivo/Barcroft Media via Getty Images)
Now playing
01:04
See mesmerizing footage of Mount Etna spewing lava
Vials of vaccine are packed at the Generium Pharmaceutical plant, which is gearing up production of Sputnik V.
PHOTO: CNN
Vials of vaccine are packed at the Generium Pharmaceutical plant, which is gearing up production of Sputnik V.
Now playing
03:21
Exclusive: Inside Russia's new Covid-19 vaccine factory
el chapo who is rs orig_00000406.jpg
el chapo who is rs orig_00000406.jpg
Now playing
00:57
Who is 'El Chapo'?
screengrab codogno lockdown one year on
PHOTO: CNN
screengrab codogno lockdown one year on
Now playing
02:20
Residents in Italian town reflect on life one year under pandemic
People clean tar from an oil spill in the Mediterranean sea in Gador nature reserve near Hadera, Israel, Saturday, Feb. 20, 2021. Hundreds of volunteers are taking part in a cleanup operation of Israeli shoreline as investigations are underway to determine the cause of an oil spill that threatens the beach and wildlife, at Gador Nature Reserve near the northern city of Hadera, the tar smeared fish, turtles, and other sea creatures.
PHOTO: Ariel Schalit/AP
People clean tar from an oil spill in the Mediterranean sea in Gador nature reserve near Hadera, Israel, Saturday, Feb. 20, 2021. Hundreds of volunteers are taking part in a cleanup operation of Israeli shoreline as investigations are underway to determine the cause of an oil spill that threatens the beach and wildlife, at Gador Nature Reserve near the northern city of Hadera, the tar smeared fish, turtles, and other sea creatures.
Now playing
01:10
Oil spill leads Israel to close beaches
Now playing
03:26
CNN speaks with sister of slain Myanmar protest victim
Prime Minister Boris Johnson giving his speech to Parliament, in in the House of Commons, London, about setting out the road map for easing coronavirus restrictions across England. Picture date: Monday February 22, 2021. (Photo by House of Commons/PA Images via Getty Images)
PHOTO: House of Commons/PA Images via Getty Images
Prime Minister Boris Johnson giving his speech to Parliament, in in the House of Commons, London, about setting out the road map for easing coronavirus restrictions across England. Picture date: Monday February 22, 2021. (Photo by House of Commons/PA Images via Getty Images)
Now playing
02:09
Here's what we know about England's reopening plans
Luca Attanasio - The ambassador killed in DR Congo. He and the military were traveling aboard a car in a MONUSCO convoy, the United Nations stabilization mission in the Democratic Republic of Congo.
PHOTO: Italian Embassy Kinshasa
Luca Attanasio - The ambassador killed in DR Congo. He and the military were traveling aboard a car in a MONUSCO convoy, the United Nations stabilization mission in the Democratic Republic of Congo.
Now playing
01:43
What we know about the killing of Italy's ambassador to the DRC
(CNN) —  

Former UK Prime Minister Tony Blair has called Brexit “tragic” and said that Boris Johnson faces a steep challenge in trying to negotiate a trade deal with the European Union by the end of 2020, without making significant concessions.

Blair, who was Prime Minister between 1997 and 2007, does not support Britain’s departure from the EU and campaigned for a second Brexit referendum on the issue.

In an interview with CNN’s Christiane Amanpour, Blair weighed in on the result of the UK general election, which saw his Labour Party suffer a historic defeat. Long-held Labour heartlands, known as the “red wall,” fell to Johnson’s Conservative Party, which ran on a promise to “Get Brexit Done.”

The victory made Johnson the most powerful Prime Minister since Blair won a landslide for Labour in 1997.

Blair told CNN that Labour had made a catastrophic mistake in allowing a general election to be held on the single issue of Brexit.

“It’s tragic. We should never have agreed a Brexit general election, by the way, it was crazy to mix the two issues up,” Blair said.

“We should have had a decision by the British people on Brexit, self-standing as a decision, but we didn’t.”

Johnson’s gamble to hold a snap general election on the future of the UK’s relationship with the EU paid off spectacularly. His Conservative Party won a sizeable majority, which will allow him to get his Brexit deal through Parliament without any further delay and take Britain out of the bloc by the end of January.

After Johnson’s deal is passed and ratified, the UK moves into an even more expansive and complicated negotiation period, setting out just how closely aligned it will stay to the EU on issues like the environment, competition, workers’ rights and trade.

Johnson is hoping to secure a new trade agreement with the EU by December 2020, before the end of the so-called transition period – during which the UK will be formally out of the bloc, but still subject to all its rules and regulations.

That’s a quick turnaround, especially if Johnson seeks to diverge significantly from EU rules, as he has indicated.

If Johnson is serious about sticking to that timetable, then he must be prepared to compromise on just how deep and ambitious any potential deal might be, Blair said, adding that the new PM underestimates the size of that problem “at his peril.”

“If you’re deciding you want to make your own rules, and you still want access to the European markets, that’s a tricky negotiation and I don’t see any way that that can be concluded by the end of next year,” Blair said.

“If he’s serious and he says, ‘right, we’re going to legislate that we’re out no matter what in 2020,’ he’s going to find that very difficult unless he’s prepared to make a lot of concessions to Europe.”