In this week’s Centre for European Reform podcast Camino Mortera-Martinez, head of the Brussels office, joins Charles Grant, director of the CER, and Heather Grabbe, senior advisor at the Open Society Foundation, to discuss the prospect of EU enlargement. They talk about the likely timeline of the accession process, the countries with prospects of joining and which of these will struggle to meet the EU's criteria. Camino and Charles then debate whether the Lisbon Treaty will be used for this next round of accession or if treaty change might be required.