Europe thinks the unthinkable - what happens if the Eurozone splits. What would happen to the banking sector, how would a new currency be put in place, can contagion be halted, and more fundamentally could the Euro survive? Policymakers across Europe are putting their contingency plans together. We reveal what some of the preparations may be. Reporter Chris Bowlby runs through some of the scenarios of what may happen if a country were to withdraw, and crucially what would happen next.

Contributors: Dawn Holland, National Institute of Economic and Social Research; Aristotle Kallis, Political Scientist; David Marsh, author "The History of the Euro"; David Lascelles, senior fellow of the Centre for the Study of Financial Innovation; Mark Crickett De La Rue; and Larry Hatheway, UBS

Producer: Kavita Puri.