* Miners fall; Rio posts drop in aluminium output
* Defensives in demand, lend support
By Dominic Lau
LONDON, April 15 (Reuters) - Britain's FTSE 100 <
> edged lower by midday on Wednesday led by mining stocks, weighed by a fall in Rio Tinto <RIO.L> after it posted weak output data, although defensive issues were lending some support.By 1046 GMT, the UK index was down 16.14 points, or 0.4 percent, at 3,972.85 in a choppy session after trading as high as 4,023.35. The benchmark is down 10 percent this year, but is up 14.8 percent since hitting a six-year low on March 9.
Rio Tinto <RIO.L> shed 4.6 percent after its first-quarter aluminium output fell 6 percent as the world's biggest producer attempted to better balance supply with sinking global demand from industrial sectors.
The mining sector also suffered on news that China's annual GDP growth slipped to a record low in the first quarter. Xstrata <XTA.L>, Vedanta Resources <VED.L>, Kazakhmys <KAZ.L>, BHP Billiton <BLT.L> and Anglo American <AAL.L> dropped 3.5 to 6 percent.
"There is a feeling out there nobody is quite sure which way everything is going to go at the moment," said Howard Wheeldon, senior strategist at BGC Partners.
"We are see-sawing from one set of statistics to another. They will be bad, they will be good. The market will just follow that. The trend remains uncertain."
Defensive stocks like drugmakers, cigarette makers, utilities, and food retailers and producers were in demand after they lagged behind cyclicals in the recent rally, and as growth concerns returned to haunt investors after weak U.S. retail sales data.
GlaxoSmithKline <GSK.L>, Imperial Tobacco <IMT.L>, British American Tobacco <BATS.L>, Centrica <CNA.L>, Morrison Supermarkets <MRW.L>, Unilever <ULVR.L> and Tesco <TSCO.L> put on between 1.3 and 3.4 percent.
BAE Systems <BAES.L> advanced 3.1 percent on hopes for increased contract work resulting from the U.S. defence budget supplements.
Banks were also weaker, in general, with Barclays <BARC.L>, HSBC <HSBA.L>, Royal Bank of Scotland <RBS.L> and Standard Chartered <STAN.L> off 0.8 to 3.7 percent.
"It's a reality check. The rally we had in the last month is a bear market rally," said David Morrison, market strategist at GFT Global Markets.
"I don't think the underlining problems have been addressed in the banking and the financial sector. They still exist. We are a long way (from) being through this."
Also in the financial sector, Schroders <SDR.L> sank 7.8 percent, knocked by a Credit Suisse downgrade to "underperform" from "neutral" ahead of the fund manager's first-quarter trading statement, due on April 23.
Insurer Legal & General <LGEN.L> also fell after going ex-dividend. (Additional reporting by Jon Hopkins; editing by Simon Jessop)