This smells like a rat. They appear to be introducing this law to protect their current activities, which were declared "invalid" by the European Court of Just

This smells like a rat. They appear to be introducing this law to protect their current activities, which were declared "invalid" by the European Court of Justice. The sunset clause is an attempt to prolong the debate to the point where the public loses interest, at which point all that needs to be passed in 2016 is a simple "confirmation of existing practice" for this to become permanent. I wonder, though, how much the European Court's ruling is binding on the UK, and if they would fall foul of it if this law is passed.