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.