(Corrects 14th paragraph to read "$700 billion" instead of "$70 billion"
* FTSE 100 down 0.3 pct
* British Energy soars after EDF launches takeover
* Miners, energy stocks down
* Banking stocks lifted by Buffett's Goldman stake
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By Simon Falush
LONDON, Sept 24 (Reuters) - Britain's top share index fell 0.3 percent by midday on Wednesday as weakness in energy companies outweighed a slight rise in banking stocks in thin, jittery trading.
Banks were in the black as central banks moved for the second time in 24 hours to pour billions of dollars into money markets and U.S. investor Warren Buffett's Berkshire Hathaway said it would buy a $5 billion stake in Goldman Sachs <GS.N>. [
]By 1118 GMT, the FTSE 100 was down 14.5 points, or 0.3 percent at 5,121.4, after losing 1.9 percent on Tuesday. The UK benchmark has fallen 20.4 percent so far this year.
The blue chip index's losses were also limited by gains in British Energy <BGY.L> after France's EDF <EDF.PA> launched a bid for the group. [
]However, overall sentiment was dominated by the crisis in global financial markets that was reignited by the demise of U.S. investment bank Lehman Brothers, which was forced into bankruptcy protection last week.
"There's a bit of a relief rally (in banks), people are bottom fishing after sharp recent falls but people are still very concerned about the fallout from Lehman, and there's still likely to be negative news so I wouldn't think that banks will end the week up," Colin McLean, managing director at SVM Asset Management in Edinburgh, said.
The FTSE 350 bank index <.FTNMX8350> was up 0.4 percent on the day, but down 6 percent on the week, on track for its biggest fall since January..
Standard Chartered <STAN.L> gained 0.75 percent, Royal Bank of Scotland <RBS.L> added 4.6 percent and HBOS <HBOS.L> firmed 1.7 percent.
However HSBC <HSBA.L> and Lloyds TSB <LLOY.L> were in the red.
Barclays <BARC.L> added 1.1 percent. The head of Barclays' Italian unit said the lender is interested in bidding for 150 branches that Banca Monte dei Paschi di Siena <BMPS.MI> must sell partly to meet antitrust concerns. [
Man Group <EMG.L> rose 2.8 percent. A source close to the hedge fund group said the company had asked the UK Financial Services Authority to extend its ban on short-selling to Man Group shares. [ID:nLO11977]
British Energy surged 5.8 percent to top the FTSE 100 gainers after France's EDF <EDF.PA> launched a 12.5 billion pound ($23.14 billion) agreed takeover bid for the UK nuclear power operator. [
]EDF and Centrica <CNA.L>, which owns British Gas, are in talks about Centrica taking a 25 percent stake in British Energy following EDF's completion of the deal. Centrica shares strengthened 2.7 percent.
THIN TRADING
However generally moves were muted and volumes low as investors awaited more details on the progress of the U.S. government's $70 billion financial bailout plan.
"The market is very nervous. No one knows what to do," a trader in Frankfurt said.
Energy stocks eased, with BP <BP.L>, Royal Dutch Shell <RDSa.L>, BG Group <BG.L> and Tullow Oil <TLW.L> down between 0.7 and 2.6 percent.
Imperial Tobacco <IMT.L> gained 2.7 percent after the world's fourth-largest cigarette maker said trading was in line with its expectations as it made progress with the integration of Altadis, particularly in France. [
]Rival British American Tobacco <BATS.L> added 0.5 percent.
Smiths Group <SMIN.L> rose 2.9 percent after the British engineer posted a 10 percent rise in underlying full-year profit, at the top end of forecasts, and announced three-year sales growth and margin targets for its five businesses.
Medical products firm Smith & Nephew <SN.L> gained 2.7 percent after Dresdner Kleinwort raised its rating to "buy" from "hold".
Mining stocks were mixed with lower gold prices weighing on sentiment on the sector but stronger base metals supporting some stocks.
Rio Tinto <RIO.L>, Kazakhmys <KAZ.L>, and Eurasian Natural Resources <ENRC.L> were flat to 5.3 percent higher, while BHP Billiton <BLT.L>, Xstrata <XTA.L> Antofagasta <ANTO.L> and Anglo American <AAL.L> fell between 0.5 and 4.5 percent.
Lonmin <LMI.L> gained 1.1 percent despite the Financial Times saying confidence was waning that Xstrata <XTA.L> would proceed with a formal 5 billion pound offer for Lonmin.
Vedanta Resources <VED.L> said it had dropped plans to streamline its corporate structure into three units. Vedanta shares were down 5.7 percent.
Inmarsat <ISA.L>, Petrofac <PFC.L> and Aviva <AV.L> fell after going ex-dividend while G4S <GFS.L> gained 0.6 percent. (Additional reporting by Dominic Lau and Peter Starck; editing by Sue Thomas)