<p><br /> David Cameron has told Germany that Britain needs a stable euro currency.<br /> </p><p><br /> "Britain wants a strong and stable euro zone," the Prime Minister told a joint news conference with German Chancellor Angela Merkel.<br /> </p><p><br /> But he said that Britain would not agree to any EU treaty changes that drew Britain further into the euro.<br /> </p><p><br /> Cameron was visiting Berlin a day after going to Paris on his first foreign trip as head of a coalition British government.<br /> </p><p><br /> Asked whether Britain planned to imitate Germany's surprise ban on naked short selling of certain financial instruments this week, Cameron said this was a matter for Britain's Financial Services Authority.<br /> </p><p><br /> Mr Cameron's message in both Berlin and Paris has been the coalition's commitment to a "constructive engagement" with the rest of the EU - but that stops short of Britain offering a contribution to the massive 500 billion-euro bail-out for the euro which the 16 single currency member states agreed.<br /> </p>
