*FTSE 100 falls 2.6 pct
*Banks and miners the standout losers
*British Energy up after broker price target hike
*Carphone down on BT's $3 bln broadband expansion
By Dominic Lau
LONDON, July 15 (Reuters) - Britain's top share index fell 2.6 percent by midday on Tuesday, led by banks as investors fretted about problems at financial institutions despite Washington's plan to stabilise two leading mortgage providers.
By 1044 GMT, the FTSE 100 <
> was down 136 points, or at 5,164.4 after gaining 0.7 percent on Monday. The UK benchmark index has fallen nearly 20 percent so far this year."The problems they (Fannie Mae and Freddie Mac) face still highlight issues which are fundamental to the market," said Henk Potts, equity strategist at Barclays Stockbrokers.
"The reality is everyday investors are looking at ... runaway inflation, falling house prices, weak business and consumer confidence surveys and that continue to sap away investors' confidence."
Soaring food and fuel prices pushed Britain's inflation rate to nearly double the central bank's 2 percent target in June, boosting talk of interest rate hikes ahead. [
]European shares were also down sharply by mid-session.
Banks were the biggest losing sector on the FTSE 100, with Barclays <BARC.L>, Royal Bank of Scotland <RBS.L>, HSBC <HSBA.L>, HBOS <HBOS.L>, Lloyds TSB <LLOY.L> and Standard Chartered <STAN.L> down between 4.2 and 8 percent.
Mid-cap Alliance & Leicester <ALLL.L> dropped 6.3 percent after soaring more than 50 percent on Monday after Spain's Santander <SAN.MC> said it had reached a deal to buy the UK mortgage lender.
U.S. stocks fell overnight as worry about the health of the U.S. banking sector after Friday's collapse of IndyMac outweighed earlier optimism over the government's plan to stabilise Fannie Mae <FNM.N> and Freddie Mac <FRE.N>. In Asia, Japan's Nikkei average <
> lost 2 percent.Kazakhmys <KAZ.L> dropped 2.4 percent. The copper producer, which said on Monday it was holding merger talks with an unnamed firm, denied speculation the deal might involve a reverse takeover.
Miners were also standout losers as metal prices eased. BHP Billiton <BLT.L>, Rio Tinto <RIO.L>, Anglo American <AAL.L>, Xstrata <XTA.L>, Vedanta Resources <VED.L>, Eurasian Natural Resources <ENRC.L>, Antofagasta <ANTO.L> and Lonmin <LMI.L> slipped 1.7 to 5.7 percent.
BT Group <BT.L> lost 4.4 percent after the telecom group said it plans to invest 1.5 billion pounds ($3 billion) to roll out super-fast broadband to up to 10 million UK homes by 2012 and would suspend its share buyback programme from July 31.
Carphone Warehouse <CPW.L> shed 7.7 percent and BSkyB <BSY.L> slipped 3.4 percent after the BT announcement.
Also, a survey showed British retail sales values fell last month after May's sun-driven boost as consumers cut back on most items except groceries. [
]Investors will keep an eye on U.S. retail sales and producer prices data at 1230 GMT and Federal Reserve Chairman Ben Bernanke's testimony to the Senate Banking Committee later in the day for more clarity on the strength of the U.S. economy.
POWER UP
British Energy <BGY.L> rose 1.5 percent to top the FTSE 100 gainers, after Morgan Stanley lift its price target on the stock and proposed investors to go long of the nuclear power operator and short of Drax <DRX.L>.
UK housebuilders sank after a survey showed British house price falls eased slightly in June but market conditions remained bleak with sentiment near record lows. [
]Redrow <RDW.L>, Persimmon <PSN.L>, Bovis Homes <BVS.L>, Barratt Developments <BDEV.L> and Bellway <BWY.L> shed between 2.6 and 5.9 percent.
"While the demand for housing has all but dried up, inventory has not yet built up significantly," Lehman Brothers said in a note.
"However, with mortgage supply reduced, credit conditions tighter and unemployment very likely to rise as the economy slows, the level of forced selling could rise, adding further downward pressure to house prices." (Additional reporting by Atul Prakash; Editing by Quentin Bryar)