By Rebekah Curtis LONDON (Reuters) - European shares rose 2 percent by mid-session on Tuesday, looking set for a sixth straight day of gains as banks and oil shares advanced and investors bet on likely rate cuts in Europe later this week At 6:45 a.m. EDT the FTSEurofirst 300 index of top European shares was 2 percent higher at 952.44 points. The FTSEurofirst 300 has lost nearly 40 percent this year in a global equities slump, sparked by a credit crisis that has shaken the world's top banks and brought a slowing global economy onto the brink of recession. Investors fretting over the future of the U.S. economy had their attention firmly fixed on the U.S. presidential election. Democrat Barack Obama leads Republican John McCain in five out of eight key battleground states, according to a series of Reuters/Zogby polls released on Tuesday. Across Europe, Britain's FTSE 100 .FTSE rose 1.8 percent, Germany's DAX .GDAXI gained 2 percent and France's CAC .FCHI rose 2.3 percent. "The odds are slightly better for higher indices by the end of the year," said Bernd Meyer, head of pan-European equity strategy at Deutsche Bank in London. "We now have a more favorable seasonality. Typically, the market is relatively weak in September and October, but the period of November to January tends to be a positive period." Banks were the biggest gainers. BBVA (BBVA.MC: Quote, Profile, Research, Stock Buzz) rose 5.7 percent and Societe Generale (SOGN.PA: Quote, Profile, Research, Stock Buzz) jumped 8.2 percent. SocGen's chief executive told French newspaper Les Echos that it could issue another 1.7 billion euro ($2.17 billion) hybrid bond next year. But Royal Bank of Scotland (RBS.L: Quote, Profile, Research, Stock Buzz) slid 5.8 percent after it reported a smaller-than-expected writedown on toxic assets in the third quarter but said it faced more writedowns this quarter and bad debts are rising sharply. UBS AG (UBSN.VX: Quote, Profile, Research, Stock Buzz) was 0.4 percent lower after it said a government bailout is helping to stem client money outflows but warned that it could take a 6 billion Swiss franc ($5.20 billion) hit in the fourth quarter due to accounting effects. RATES EYED Australia joined several other central banks on Tuesday by cutting its benchmark cash rate by 75 basis points. The focus now shifts to the European Central Bank and the Bank of England, which are widely expected to serve up 50-basis point cuts on Thursday. "We see it happening all around the globe. We had the U.S., Japan and now Australia, and we will have cuts in (the UK) and the euro zone," Meyer added. The energy sector was a standout riser, with BP (BP.L: Quote, Profile, Research, Stock Buzz), Total (TOTF.PA: Quote, Profile, Research, Stock Buzz) and Royal Dutch Shell (RDSa.L: Quote, Profile, Research, Stock Buzz) gaining between 1.2 and 2.5 percent as U.S. crude rose more than 1 percent toward $65 a barrel. UK gas and oil producer BG Group (BG.L: Quote, Profile, Research, Stock Buzz) rose 2.3 percent after it beat analysts' forecasts with a sharp rise in third-quarter profit and gave a buoyant outlook. Marks & Spencer Plc (MKS.L: Quote, Profile, Research, Stock Buzz) surged 9.1 percent. Britain's biggest clothing retailer posted a 34 percent drop in first-half profit on Tuesday, which was not as bad as expected in the context of a deepening consumer downturn, and self-confessed mistakes at its food business. Chemicals group Clariant (CLN.VX: Quote, Profile, Research, Stock Buzz) soared 16.4 percent after it beat forecasts with its quarterly profit. Defensive pharmaceuticals also climbed. Roche (ROG.VX: Quote, Profile, Research, Stock Buzz) added 2.6 percent, AstraZeneca (AZN.L: Quote, Profile, Research, Stock Buzz) rose 1.5 percent and Novartis (NOVN.VX: Quote, Profile, Research, Stock Buzz) put on 1.6 percent. Swiss Re (RUKN.VX: Quote, Profile, Research, Stock Buzz), the world's second-biggest reinsurer, reported a surprise third-quarter net loss, sending shares down 3.6 percent. (Additional reporting by Sitaraman Shankar; Editing by Victoria Bryan)

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