A European official says British Prime Minister David Cameron and European Council President Donald Tusk will meet Sunday night to discuss the EU reforms Britain is asking for ahead of a referendum on continued membership, AP reported. Following an EU summit on Turkey and the refugee crisis on Sunday afternoon, Cameron and Tusk will meet for pre-arranged talks about which major stumbling blocks remain over the extent of reforms. The U.K. will hold a referendum on whether or not it should remain in the 28-nation EU by the end of 2017. Cameron favors staying in provided he can secure a looser relationship between Britain and the bloc. He hopes to get into detailed negotiations on a deal at a December summit focused on Britain's EU membership.