LONDON, March 6 (Reuters) - European stocks are seen slightly softer at the open on Wednesday as investors lock in some profits on the previous session's jump to multiyear highs and nervousness creeps in ahead of key central bank meetings and data due this week. Financial spreadbetters expected Britain's FTSE 100 to open down 5 to 10 points, Germany's DAX to fall 7 to 13 points, and France's CAC 40 to ease 7 to 8 points. That represents a fall of as much as 0.2 percent for all three indexes