There are grounds on which we can exclude individuals from coming back into the country, but public policy and public security grounds must be proven. I am happy to write to the hon. Gentleman with a more detailed explanation of how those blocks occur. The prisoner transfer agreements are those where individuals are serving a sentence, so we are asking them to serve out their time to society where they came from.
Finally, the transposition of the free movement of persons directive required the approval of the House and was not prayed against when it was laid in 2006. One draws the assumption that it commands the support of all sides of the House. Therefore, it is a constraint, but one that Parliament has imposed.