The Government does have estimates for the number of workers from Romania and Bulgaria who could come to the UK once restrictions are lifted - but it is currently refusing to tell the rest of us while it decides whether revealing the figures would be in the public interest.
But responding to a Freedom of Information request asking for the numbers, an official said: "Your request . . . raises complex public interest considerations which must be analysed before we can come to a decision" on whether to release the numbers.