UEFA Euro 2012 in October 2011, the nine group winners qualified automatically, along with the highest ranked second placed team. The remaining eight-second placed teams contested two-legged play-offs, and the four winners qualified for the finals. Twelve of the sixteen finalists participated at the previous tournament in 2008. England and Denmark made their return to the Euro, having last participated in 2004, while Republic of Ireland returned after a twenty-four-year absence to make their second appearance at a European Championship. One of the co-hosts, Ukraine, made their debut as an independent nation (before 1992 Ukraine participated as part of the Soviet Union). With
UEFA Euro 2012 World Cup. Each national team had to submit a squad of 23 players, three of whom must be goalkeepers, at least ten days before the opening match of the tournament. If a player became injured or ill severely enough to prevent his participation in the tournament before his team's first match, he would be replaced by another player. On 20 December 2011, UEFA named twelve referees and four fourth officials for Euro 2012. On 27 March 2012, UEFA issued the full list of 80 referees to be used in Euro 2012, including the assistant referees, the additional assistant referees, and