Around 600 young people in total have been interviewed by Home Office officials in the past week.
On the eve of the demolition of the Calais "Jungle" camp, French officials on Sunday handed out flyers in several languages notifying migrants of the camp's imminent closure and urging them to abandon their dreams of reaching Britain.
Less than 24 hours before the operation to raze the squalid settlement near Calais port was due to start some migrants, however, were still clinging to hopes of a new life across the Channel.
"We have yet to convince some people to accept accommodation and give up their dream of Britain. That's the hardest part," Didier Leschi, head of the French immigration office OFII told AFP.
Some Afghans have vowed not to budge — or to make their own way back to Calais from the regional shelter to which they are sent.
"They'll have to force us to leave. We want to go to Britain," Karhazi, an Afghan, said.
Others welcomed the move.
"You never know. The demolition may ultimately be a good thing," said Faisal al-Ajab, a 39-year-old Sudanese man, who has already applied for asylum in France and has been living in the Jungle while waiting for housing.
"The officials say tomorrow is the beginning of something better. Let's hope this is true," Ajab, who used to make his living as an interior decorator, said as he trimmed his friend's beard for the move.
The Jungle is 'over'
The camp's demolition and the resettlement of its estimated 6,000-8,000 residents in refugee shelters around the country is due to get underway on Monday morning.
Hammoudi, a 22-year-old from Aleppo, Syria, told AFP that despite a semblance of normality in parts of the camp, "everyone knows it's over".
"Today is the last day of the Jungle," he said.
Officials and aid workers distributed the flyers on Sunday instructing migrants in text and pictures to show up at a hangar near the camp from 8:00 am (0600 GMT) with their luggage.
From there the migrants — mostly Afghans, Sudanese and Eritrean males — will be taken by bus to temporary shelters, where they can seek asylum.
Some 145 buses will be deployed over the course of the three-day move.
But most of the migrants who travelled thousands of miles to Calais did so in the hope of stowing away on a lorry heading to Britain, where they have contacts and believe their job prospects are better.
Pascal Brice, head of the Ofpra asylum agency, said his staff were trying to convince migrants that Calais was a "dead end" and that their asylum requests in France would be processed "very quickly".
Around 70 percent of migrants evicted from other camps in Calais in the past had been given French residency, he said.
British officials have been racing to process child refugees seeking to be transferred to Britain before they become scattered around France.
By Saturday, the number of minors given a one-way ticket to Britain under a fast-tracked process launched a week ago stood at 194, according to France Terre d'Asile, a charity helping in the process.
Most have relatives across the Channel but 53 girls with no family in Britain were also accepted on Saturday, France Terre d'Asile said.
Britain's Home Office (interior ministry) did not confirm the numbers but a spokesman confirmed that officials had "now started the process of taking in those children without close family links".
Around 600 young people in total have been interviewed by Home Office officials in the past week — representing around half the number of children living in the camp without family.
The ages of those migrants who have already reached Britain has been the subject of a bitter row, with Conservative MP David Davies controversially calling for their teeth to be check to determine the age of those who look over 18.
The demolition of the Jungle aims to close a difficult chapter in Europe's migrant crisis.
The camp, has strained relations between France and Britain and caused tensions with locals in Calais.
Each night, migrants try to get past police to try to climb aboard trucks heading to the port — a perilous venture responsible for most of the 33 migrant deaths in the Calais region since 2015.