Europe Factors to Watch-Shares seen mixed, eyes on fiscal cliff talks

PARIS, Dec 27 (Reuters) - European stocks are seen mixed on Thursday in their first trading session following the Christmas break, with investors focusing on Washington's last-ditch efforts to avoid the so-called fiscal cliff. Financial spreadbetters expect Britain's FTSE 100 to open between 7 points lower and 19 points higher, or up as much as 0.3 percent, Germany's DAX to open between 11 points lower and 20 points higher, or up as much as 0.3 percent, and France's CAC 40 to open between 2