Cameron's mixed message on immigration: who is welcome?

David Cameron has been banging the drum for curbs and caps on immigration, but he said in an interview on Indian television yesterday that there was no limit on the number of Indian nationals who can come to study, and no limit on those who can stay afterwards - if they have a job.

So why has he made these comments, and how do they stack up with all his speeches on closing the doors to the UK?

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