(Adds futures prices, more company news items) LONDON, Sept 21 (Reuters) - European equity futures fell on Monday, impacted by weakness on Asian and U.S. stock markets due to persistent worries about global eco**mic growth, while shares in carmaker Volkswagen were seen lower after it had to halt sales of some 2015 diesel cars. futures for the euro zone's blue-chip Euro STOXX 50 fell 0.2 percent. futures on Germany's DAX and on Britain's FTSE both fell by 0.4 percent while futures on F