British Prime Minister David Cameron warned Sunday that countries outside the eurozone risked being frozen out amid efforts for a pooled response to the crisis crippling the 17-nation single currency bloc.
"What you've got happening in Europe at the moment is eurozone countries coming together recognising that they've got to do more things together and frankly it's in Britain's interest that they do sort out the problems they've got," said Cameron after a crunch EU summit.
"But there is a danger that as this eurozone coming together happens, there is a risk that those countries outside the euro might see the eurozone members starting to take decisions that affect the single market."
He stressed that he had pushed for safeguards to be included in the final statement to prevent this happening as diplomats said a row over the text had delayed the end of the meeting.
Asked if he found it frustrating to watch decisions being taken in the eurozone without being in the room, Cameron said: "Well, no, I don't find it frustrating because I'm not in the euro and I don't want Britain to join the euro."