One of the compelling reasons the UK needs a new relationship with the EU and needs to be outside the current Treaties is the lack of control we now have over our welfare system and borders.
The news this week that Calais cannot cope with all the illegal migrants who wish to come to the UK highlights the problems.
First, in a common border area your border is as weak as the weakest border in the EU. If the southern states will not police their borders more effectively to prevent first entry to the EU, then the northern countries will end up with more and more problems with migrants.
Second, if the UK has to offer under EU rules the same in work and out of work benefits to all recent arrivals from the EU as we offer to our own citizens, it will attract more people.
Third, if the UK economy continues to generate a lot of jobs, but the Euro area economies remain mired with high unemployment, the UK will attract a large share of the illegal migrants to the EU.
The UK answer to this problem is to remove ourselves from the common border and welfare policies. We could do a better job controlling our own systems than we can do under EU rules. The EU answer should be effective border controls throughout the EU. It would also help the EU case if they changed their mind and allowed the UK to take tougher action over access to benefits.