* Roller coaster session for the pound
* FTSE ends slightly up as pounds edges down
* Galenica jumps 7.5 pct after earnings beat expectations
* Geberit falls after results (Adds closing prices)
By Helen Reid and Julien Ponthus
LONDON, March 12 (Reuters) - European shares ended flat on Tuesdat after a choppy session during which hopes British Prime Minister Theresa May would win support for her plans for an orderly Brexit in an evening vote in Parliament gradually faded.
European bourses trimmed their morning gains and the pan-European index .STOXX ended the day down 0.04 percent while the euro zone's STOXXE .STOXXE rose a mere 0.1 percent.
Dublin's ISEQ .ISEQ , which typically falls on fears of a disorderly Brexit, edged up 0.25 percent with investors still confident a no-deal Brexit will eventually be averted.
Britain's FTSE 100 .FTSE rose 0.3 percent as a retreating pound provided an accounting boost to the big exporters that dominate the index.
The British currency experienced heavy volatility, pushing blue chips in and out of positive territory.
"Sterling rode the proverbial Brexit rollercoaster on Tuesday," wrote Spreadex analyst Connor Campbell.
Among individual stocks, French engineering firm Spie SPIE.PA jumped 8.6 percent after reporting stronger-than-expected net income.
Swiss drug retailer Galenica GALE.S was also among top winners, gaining 6.2 percent after full-year earnings and dividend beat the market's expectations. carmaker Volkswagen VOWG_p.DE fell 1.8 percent after reporting a decline in operating margins for its core VW brand and announcing it would introduce almost 70 new electric models by 2028. payments firm Adyen ADYEN.AS dropped 5 percent after pre-IPO investors sold 2.5 million shares at a 9 percent discount. the fourth-quarter earnings season has been underwhelming. Over the past four months, analysts have cut their earnings growth expectations for 2019 from 9 percent to just 5 percent.
Swiss baked goods firm Aryzta ARYN.S jumped 9.75 percent after it reported its U.S. margin grew for the first time since 2014. results, Telecom Italia TLIT.MI shares fell 5.9 percent to the bottom of the FTSE MIB .FTMIB as a battle between two of its top shareholders, Vivendi (PA:VIV) and Elliott, ramped up ahead of an AGM later in the day. Europe earnings growth expectations MARCH 12
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