The government has admitted that it has tried to forcibly remove tens of thousands of people from the UK unlawfully.
The figures were disclosed to the Guardian after a freedom of information request which showed that almost half of the enforced removals the government attempted were cancelled.
Critics say the high number of cancellations and attempted unlawful removals are signs of a system in chaos.
In 2012, 14,435 enforced removals took place but between January and November 11,085 were cancelled. The figure for the full year is likely to be about 12,000 cancelled removals, almost half of the total.