Around 30,000 Berliners filled the An der Alten Foersterei football stadium on Saturday evening, to take part in FC Union Berlin’s annual carol singing event. Led by a children’s choir and band, the crowd sang along to classic Christmas songs, including ‘Silent Night’ and ‘O Christmas Tree’. This now annual tradition has some rather devious roots. Back in 2003, 89 festive Union Berlin fans... Еще broke into the stadium, drank mulled and sang Christmas carols. Fast forward 15 years and the concert has become a firm fixture in the club's footballing diary for many supporters.