Net migration to UK drops to lowest level for three years.

They were at a record high 3 years ago, and every year since then.

Last year for instance,
"The population of the UK has increased by more than half a million - the biggest rise for 70 years - according to official figures.
There were 65,648,000 people in the UK in June 2016, according to the Office for National Statistics (ONS).
The ONS said that was a rise of 538,000 on the figure in 2015, equivalent to a city the size of Bradford."

"Neil Park, head of the Population Estimates Unit at the ONS, said: "The population of the UK continued to grow in the year to mid-2016 at a similar rate to that seen over recent years.
"Net international migration continued to be the main driver, but there was also an increase in births and fewer deaths than last year."
The population of the UK has increased by just over five million in 11 years - previously it took 35 years, from 1970 to 2005, to make the same leap.
Population change in the UK has averaged 482,000 a year over the past decade."

The source is the ONS quoted here by BBC.
http://www.bbc.co.uk/news/uk-40372533