I have been asked to reply on behalf of the Cabinet Office.
The information requested falls within the responsibility of the UK Statistics Authority. I have asked the authority to reply.
Letter from Glen Watson, dated October 2012
Estimates have been produced from two datasets;
Firstly, the number of overseas travel and tourism visits to the UK of less than 12 months in duration which are completed in the reporting year, as measured by the International Passenger Survey (IPS) - these estimates are used to respond to questions a) and b);
Secondly, the number of people migrating to the UK for 12 months or more (long-term international migration, LTIM) during the reporting year, based on the IPS plus adjustments - these estimates are used to respond to question b).
The most recent year for which both sets of estimates are available is 2010.
Estimates are as follows:
a) The estimated number of completed visits of less than three months' duration to the UK by EU nationals, completed in 2010 is 17,702,000. b) The proportion of non-UK EU nationals' visits who left the UK within three months of entering the UK is estimated as 98.6 per cent of all travel to the UK by non-UK EU nationals. This includes both overseas travel and tourism visits to the UK by non-UK EU nationals completed in 2010 plus all inbound long term migration commencing in 2010.