Countries like France that share the euro currency worry that protections for Britain and other non-eurozone nations would offer unfair advantage to Britain's financial center, the City of London. British Prime Minister David Cameron faces tough new talks with European partners after through-the-night meetings failed to make much progress on his demands for a less intrusive European Union. Britain's future in the union — along with heightened tensions around Europe's migrant crisis — are dominating an EU summit in Brussels scheduled to finish Friday with what Cameron hopes is a deal for EU reform.