Enrico Letta and David Cameron at EU summit in June 2013
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UK is 'big risk' to EU, says Italian Prime Minister Enrico Letta

16 July 2013 Last updated at 22:57 BST

The prime minister of Italy has said the United Kingdom poses a "big risk" to the European Union.

Enrico Letta is in London for talks with Prime Minister David Cameron.

He was referring to Mr Cameron's plans for a referendum on Britain's relationship with the EU. He described the possibility of the UK leaving the EU as "a disaster for Europe".

Gavin Hewitt reports.