EU referendum: playing war games over UK future
16 December 2013 Last updated at 13:49 GMT
Britain's future in, or out, of the EU has been acted out in a political war game organised by a think tank.
The scene is 2017, with a UK government committed to reforming Britain's relationship with its European neighbours, or holding a referendum with the option of leaving the EU.
David Thompson watched the Open Europe game in action and spoke to some of those taking part in the "negotiations".