Immigration report 'being held back' by Downing Street

Downing Street has prevented the publication of a politically awkward report which found one potential cost of immigration is smaller than has been claimed, according to Newsnight.

The research suggests "displacement" - the number of UK workers unemployed as a consequence of immigration - is well below that claimed by ministers.

But this was considered potentially incendiary, Newsnight has learned.

The government has declined to comment on the document.

Newsnight's policy editor Chris Cook reports.