(Adds company news items) LONDON, Sept 21 (Reuters) - European stocks were seen opening lower on Monday, impacted by weakness overnight on Asian and U.S. equity markets due to persistent worries about global eco**mic growth. Financial spreadbetters expected Britain's FTSE 100 to open down by 22 points, or 0.4 percent lower. Germany's DAX was seen opening down by 46-47 points, or 0.5 percent lower, while France's CAC 40 was expected to fall by 10-13 points, or 0.2-0.3 percent lower.