BUZZ-Wolseley: worst day in 6 yrs after cutting guidance
** Wolseley (LSE: WOS.L - news) falls 9.1 pct after the building supplier lowers H2 revenue growth forecast
** Expects LfL growth of 4 pct to end-January, against 6 pct previously
** Worst day for the stock since May 2009
** Top faller and most traded by a distance on Stoxx 600 - double the next most traded by average 30-day volumes
** Co also announces £300 mln share buyback
(RM (LSE: RM.L - news) : alasdair.pal.thomsonreuters.com@reuters.net)