The ONS's review looked into the quality of migration estimates, which are based largely on the International Passenger Survey (IPS) - a system designed to collect information about passengers entering and leaving the UK.
The IPS found some citizens coming into the UK from the Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Slovakia and Slovenia had not been counted between 2004 and 2008.
This was partly because IPS interviews focused on major airports such as Heathrow, Gatwick and Manchester - at the expense of regional hubs which were increasingly being used by migrants, the ONS said.
Regional airports in the UK were either not covered at all by the IPS or not fully covered, the ONS said.
Let's get this straight. EU economic migrants fly in on Ryanair or other low cost airline to some out of the way airport and not BA into Heathrow. This might be because they are POOR. That's why they are coming here. But the power that be are too God damned stupid to even run a decent passenger survey even though this is a crazy way to track immigration.
Survey question 1. Are you coming here for:
c) sponge off the state
d) undercut UK wages
Yep. Stupid Government can't even run a proper survey.
The trouble with British democracy is the Government always gets elected.