Immigration Minister James Brokenshire wrote to Yashika Bageerathi's local MP David Burrowes outlining the reasons he could not intervene to enable her to stay in the UK to finish her A-levels.
The letter, across three pages, details how Yashika's case was decided, and the factors that prompted the court's decision. Mr Brokenshire says he has personally reviewed the case again and said he "did not consider it appropriate to intervene in this case".
Speaking to ITV News Yashika Bageerathi said she was all alone and did not know what she was going to do without her family and friends.
Speaking to her mother as she boarded she said she was scared about landing in the country she fled in 2011.
Speaking to ITV News Yashika Bageerathi appealed directly to the Immigration Minister and the Home Secretary to remain in the UK.