Are Britain's migration statistics accurate? Certainly not as accurate as I might like. That's why yesterday I wrote an article for the Huffington Post urging the Home Secretary to reintroduce entrance and exit checks on UK borders as a matter of urgency – to count people in and out of the country.

If we're going to write effective immigration policy that deters health and benefit tourism and attracts investment, we must have a detailed statistical picture of the number and category of people entering and leaving the country.

Read the article on the Huffington Post