* FTSE up 0.1 percent after earlier wobble
* Insurers higher, supported by Prudential
* Miners advance; Xstrata gains on update, stake talk
By Jon Hopkins
LONDON, Oct 21 (Reuters) - Britain's top share index was up by midday on Tuesday, as gains in energy and insurance stocks helped the broader market overcome an earlier bout of profit-taking.
At 1143 GMT, the FTSE 100 index <
> was up 6.1 points, or 0.1 percent, at 4,288.44, down from an early peak of 4,347.69. The blue-chip index closed 219.66 points higher at 4,282.67 on Monday."It's not the miners, for a change, which are heading the market gainers, but a spread of various stocks, which must be a good sign after recent single-sector led action," said Mark Priest, trader at ET Capital.
Gas producer BG Group <BG.L> was the largest individual positive contributor, rising 5.6 percent after an upbeat broker note, while Royal Dutch Shell <RDSa.L> gained 2.2 percent.
Oil services firm Wood Group <WG.L> rose 3 percent, shrugging off a dip in the oil price <CLc1>, with Petrofac <PFC.L> up 6 percent as the sub-sector continued to receive support following better-than-expected results from U.S. peer Halliburton <HAL.N> on Monday.
Xstrata <XTA.L> gave the mining sector a boost, rising 8.5 percent on market talk of a possible stake-build, traders said. Rio Tinto <RIO.L> and BHP Billiton <BLT.L> rose about 3 percent.
Xstrata, which rose by as much as 13 percent when talk surfaced that Brazil's Vale <VALE5.SA> was interested in building a near 30 percent stake in the company, declined to comment on the talk.
The stock was already up following a third-quarter trading update and the firm's comment that it has no significant debt refinancing requirements until 2011. [
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JITTERS EASE
The London market managed to shake off data that showed a drop in confidence in the manufacturing sector.
"The market was jittery earlier when Dow futures were being sold off, but after the CBI report, which was not great but no big surprise, the FTSE has moved higher," said Priest.
The Confederation of British Industry's quarterly business situation balance registered -60 in October versus -40 in July, its lowest level since July 1980.
"What we all need are a few up days to settle the market," Priest added, "and if we can get another decent performance from the U.S. today then we might be on track for a good week."
U.S. stock futures <DJc1>, <SPc1> were pointing to a lower Wall Street opening following strong gains on Monday.
Insurers rose with Aviva <AV.L> up 9 percent, Legal & General <LGEN.L> up 7 percent, and RSA Insurance Group <RSA.L> ahead 5.2 percent, supported by a trading update from peer Prudential <PRU.L>, which rose 1.6 percent.
Pru said its sales rose 15 percent in the first nine months of the year, and confirmed it was interested in buying parts of American International Group's <AIG.N> Asian business.
Banking issues were mixed. Royal Bank of Scotland <RBS.L> lost 7 percent, paring some of Monday's 23 percent as investors continued to assess the impact of the government bail-out on the firm's ability to increase dividends.
HSBC <HSBA.L> also eased, down 3.6 percent, after its move on Monday to expand in Indonesia with the acquisition of 89 percent of Bank Ekonomi <BAEK.JK>.
HBOS <HBOS.L> was the top percentage gainer on the FTSE 100, rising 10 percent to recoup some of Monday's losses, helped by supportive moves by its biggest shareholder Standard Life <SL.L> on its rescue takeover by Lloyds TSB <LLOY.L>, which rose 0.5 percent.
Other gainers included Tullow Oil <TLW.L>, which rallied 6.5 percent after the firm and its midcap partner, Heritage Oil <HOIL.L>, which gained 13 percent, unveiled a significant new oil discovery in Uganda. (Editing by Quentin Bryar)