Speaking before an EU summit in Brussels, Prime Minister David Cameron said:
"The eurozone needs a banking union, but Britain won't be part of it this union, and we've properly protected our interests in the single market."
"The countries in the Euro need to integrate more, need to integrate their institutions more," he added.
"But this change taking place does give us the opportunity to argue for the things that we want to do and get a better deal for Britain," he said.
More top news
Ukip's only MP Douglas Carswell is quitting the party and will sit in the House of Commons as the independent MP for Clacton.
Leaders from across Europe gathered in Rome to mark the 60th anniversary of the signing of a treaty which led to the formation of the EU.
The actress said film-makers doubted if she could play a straight woman in a romantic lead after speaking publicly about her sexuality.