Why Greece's debt is a problem for the UK

There has been much talk about an "end game" for the euro - with commentators suggesting that the break up of the single currency is a realistic possibility.

In Brussels, European leaders are working to stop that happening in an emergency summit to try to resolve the Greek debt crisis.

The UK is not involved - but whatever happens will have an impact here.

The former trade minister, Lord Digby Jones, explains why eurozone problems are so important for the UK.