Although the Royal Brompton Hospital lost its case in the High Court today, a final decision on the future of its children's heart unit is yet to be made.
Proposals outlined by the NHS would see the number of children's heart units in London cut from three to two.
That would see the Royal Brompton's unit closed - leaving units at only Great Ormond Street and the Evelina Children's Hospital at Guy's & St Thomas' NHS Trust.
But the final decision will not be made until later this year.
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Hundreds of passengers were ordered to leave the terminal building and flights grounded after passengers suffered difficulties breathing.
Council leaders today called on the government to provide extra money to help resettle the youngsters in the capital.
An eyewitness said: "It was very unnerving. It was just after 12pm and there were suddenly police vans and cars everywhere."