The government will not fulfil its vow to reduce net migration to the tens of thousands by 2015, the Institute for Public Policy Research think tank says.

It predicts net migration - the difference between the number of people entering and leaving the UK - will fall to 180,000 in 2012, from its 2010 peak of 252,000.

But reductions cannot be sustained at the current pace, it says.

The government insists its policies are working and the target will be met.

We've limited non-EU workers coming to the UK, overhauled the student visa system and will shortly announce reforms of the family migration and settlement routes.