The Bageerathi family's case came to light last week when it emerged that the eldest daughter, Yashika, was due to be separated from her family and deported alone because she was considered an adult.
She was given what appeared to be a last-minute reprieve yesterday when it was claimed that British Airways had refused to put her on its flight and she was returned to a detention centre, the Guardian reported.
Solicitors working on Yashika's case were told that it had been rejoined with that of the rest of her family, and that the appeal against their deportation had been rejected.
Yesterday, the news was broken to teachers and friends of two of the family's three children at the Oasis Academy Hadley, in north who have led a campaign to block the deportation supported by more than 100,000 people.
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The family, including Yashika's mother Sowbhagyawatee, 38, sister Shaivya, 16 and brother Cherish, 11, will now be deported.
Yashika's case also attracted support in Westminster.
Conservative MP David Burrowes made a plea to the Home Office on her behalf.
He said that British Airways had refused to deport the teenager yesterday afternoon, leading to her being sent back to Yarl's Wood detention centre, in Bedfordshire.
The family came to the UK in 2012, fleeing violent threats from a family member.
A student at her school said that he phoned the office of Hanson's opposite number, the Conservative immigration minister James Brokenshire, and was told they were "supportive" of the campaign to keep Yashika in the country.
A Home Office spokesman said, "The UK has a proud history of granting asylum to those who need it and we consider every application on its individual merits. We do not routinely comment on individual cases.