European shares slipped in early trade on Tuesday, giving up some of the previous session's sharp gains that were fuelled by prospects of further stimulus measures from the European Central Bank, Reuters reported. The UK market, shut on Monday for a holiday, gained ground, with the FTSE 100 index up 0.4 percent, led by WPP . At 0800 GMT, the FTSEurofirst 300 index of top European shares was flat at 1,366.94 points. The euro zone's blue-chip Euro STOXX 50 index was down 0.3 percent, at 3,157.33 points, after surging 2.2 percent on Monday, boosted by comments from ECB President Mario Draghi.