Earlier in the day, French officials started to demolish the notorious refugee camp known as "The Jungle" in the northern French port city of Calais with authorities expecting some 3,000 people to leave during the first day.
"Worryingly, those who remain include an increased proportion of minors and unaccompanied minors, with the overall number of minors up from 1,179 to 1,496 and the number of unaccompanied minors up a staggering 26 percent from 1,022 to 1,291," the statement said.
"Although we wholeheartedly welcome the British government succumbing to public pressure and allowing unaccompanied minors to be reunited with their families in the UK, sadly, for over 1,000 remaining unaccompanied children, no protection is yet available," Help Refugees stressed.
On Sunday, the UK Home Office said that the first group of 70 children, with no family ties in the United Kingdom, arrived in the country.
As for the adult migrants who are being resettled from Calais, they will be moved to other refugee centers around France, a number of which reaches nearly 450, and will be offered an opportunity to seek asylum.