Yes, there are very great practical problems, because of the question of registration across the different EU27 countries, as was mentioned by a witness earlier. There are very different schemes in practice for British citizens living in the EU. Some countries—like my country, France—do not apply any kind of registration system at all for British citizens or EU citizens from another country who are living there. So we have between 150,000 and 200,000 British citizens living in France, only around 16% of whom have any form of registration at the moment. Other countries have a system of registering your residence, but nothing else; other countries have greater systems, where you register your residence and apply for a relevant card. As you can see, there is already a huge difference between how people are treated across the countries.
Using my country as an example, we have a number of different cards for people who have been in residence for less than five years. Everybody who has been in residence in any EU country for less than five years has to fit into national immigration law. Long-term residence status, which is mixed competence between EU and national law, does not come into effect until the five year point.
As you can see, there is a big gap there. Everybody is going to be taking a different route to get there, and it is entirely possible that there will be large numbers of people who simply do not meet the conditions. What of them?