* Miners down as base metal prices drop * Banks fall, with HSBC, RBS and Barclays all down
* Aviva down on Citi downgrade; Standard Life up on results
By Martina Fuchs
LONDON, March 12 (Reuters) - Britain's FTSE 100 <
> was down 1.4 percent by midday on Thursday, led by heavyweight commodity stocks and banks, while insurer Aviva <AV.L> slumped after a Citigroup downgrade.By 1124 GMT, the FTSE 100 <
> was down 49.71 points, or 1.4 percent, at 3,644.10, after slipping 0.6 percent on Wednesday to snap a three-day winning run."It's concerns over the pace of growth in the real economy, that is the big negative -- the infrastructure spending, together with possible protectionism, coupled with the slow course of the economic revival," said Jeremy Batstone-Carr, analyst at Charles Stanley.
"But investors are still extremely cautious of the outlook until we see clear signs that economic policy measures achieve their goals."
Miners took the most points off the index, giving up their previous two sessions' hefty gains, as copper prices eased. Rio Tinto <RIO.L>, BHP Billiton <BLT.L>, Xstrata <XTA.L>, Antofagasta <ANTO.L> and Vedanta Resources <VED.L> were down 4.1 percent to 9 percent.
A price target cut from Citigroup also weighed on BHP.
Banks were also lower, with Royal Bank of Scotland <RBS.L>, Lloyds Banking Group <LLOY.L>, HSBC <HSBA.L>, Barclays <BARC.L> and Standard Chartered <STAN.L> slipping between 2.8 percent and 6.1 percent.
"Financials are still being hit hard. There is no sign of any revival in the financial sector despite the fact that quantitative easing in the UK got underway," Batstone-Carr said.
Among life insurers Standard Life <SL.L> bucked the trend and rose 2.4 percent after it reported a better than expected 6 percent rise in annual profit and said it planned to cut costs by a further 75 million pounds ($103.8 million) over the next two years. [
]Aviva <AV.L>, however, sank 12.7 percent after Citigroup cut the insurer to "sell" from "hold" and slashed its price target on the stock, saying it was one of the riskier names in the sector.
Oil producers were another standout losing sector, with BP <BP.L>, Royal Dutch Shell <RDSa.L>, BG Group <BG.L> and Cairn Energy <CNE.L> off 0.1 percent to 2.6 percent.
TELECOMS HIGHER
On the positive side, defensive stocks such as food retailers, pharmaceuticals and telecoms were broadly higher.
"The defensive sectors are doing relatively okay, with Morrison Supermarkets <MRW.L> results being quite well received and also Centrica <CNA.L> on positive ground," Batstone-Carr said.
Morrison Supermarkets, whose shares were up 1.4 percent, said it had scrapped plans to return 500 million pounds to shareholders and would take advantage of lower property prices to open more stores. [
]Inmarsat <ISA.L> put on 1.9 percent, after the satellite communications firm reported solid full-year results with earnings up 12.5 percent and said it predicted revenue growth in 2009. [
]Cable & Wireless <CW.L>, Vodafone <VOD.L> and BT Group <BT.L> added between 0.7 percent and 1.1 percent.
BT Group said on Wednesday that it would not offer pay rises to UK staff -- including its most senior executives -- for 2009/10 after it concluded an internal salary review. (Editing by Greg Mahlich)