国际英语新闻：Merkel, Cameron seek common ground amid rifts on regulation

However, the prime minister clearly rebuffed any treaty changes that make Britain hand over further powers to the EU.

"There is no question of agreeing to a treaty that transfers power from Westminster to Brussels. That is set out 100 percent clearly in the coalition agreement," Cameron said.

He stressed that any treaty, even which just applied to the eurozone members, should have a "unanimous agreement of all 27 EU states including the UK, which of course has a veto."

German Chancellor Angela Merkel (L) and British Prime Minister David Cameron attend a press conference in Berlin on May 21, 2010.

Merkel previously said that some EU fiscal and financial rules should be changed or toughened, to maintain the stability of the euro and to avoid another financial turmoil like Greek debt crisis.

Facing possible opposition from Britain, Merkel admitted that "There are ideas from Germany where treaty changes would play a role, but we say very clearly that we are just beginning this work. "

"There is no consensus at all in the euro group" on how to further regulate the financial market and stabilize the euro, Merkel said.

Britain, whose capital London is one of the world's main financial centers, also opposed to tightening control of hedge funds and private equity, which was agreed by the EU's 27-member bloc this week. France and Germany strongly backed the proposal.

Cameron's visit came the day when the German parliament approved its contribution to a 750-billion-euro (about 938 billion U.S. dollars) eurozone rescue package. Berlin is to offer around 150 billion euros.