Immigration inspectors have disclosed for the first time the existence of a backlog of more than 
150,000 cases involving people who have been refused permission to stay in Britain but whose whereabouts are unknown to the authorities.
The chief inspector of immigration, John Vine, said he discovered the existence of the UK Border Agency’s national “migration refusal pool” during his first inspection of a local immigration team.
The only guidance staff were given for dealing with cases in this 150,000-strong group was that the total size of the pool should not be allowed to increase
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