Ministers have been urged by an influential committee to draw up a plan of action to help the country cope in the event of a eurozone collapse.
US Republican presidential candidate Mitt Romney is the front-runner to challenge Barack Obama for the Presidency after securing the swing state of Ohio on Tuesday night.
Lehman Brothers has emerged from bankruptcy and is now a liquidating company that will begin the process of paying back its creditors and investors before finally being wound up.
A "disorderly" default in Greece could cause more than €1trn (£833bn) damage to the eurozone, a confidential report has warned.
China has cut its annual economic growth target for the first time in eight years, lowering its forecast to below 8% for the first time since 2004.
Recent market uncertainty has seen extreme volatility in investment markets over the last few years.