As Theresa May, the Home Secretary, pointed out this week, the original intention of the free movement principle enshrined in the founding treaty was to enable people to work in another country. This has been stretched over the years by various directives and regulations and it is now possible to travel to another member state to look for work. Mrs May said this should only be allowed if a job has already been found, though she acknowledged the obvious difficulty in her suggestion: other countries would have to agree to change the rules for the EU as a whole.