* Defensive stocks fall on profit taking
* Miners, energy heavyweights retreat after heavy gains
* U.S. housing starts, Fed meeting eyed
* Banks move into positive territory
By Farah Master
LONDON, March 17 (Reuters) - Britain's leading share index fell 0.8 percent by midday on Tuesday as energy heavyweights retreated and investors took profits on defensive stocks after recent gains, although banks were mostly up after early losses.
By 1149 GMT the FTSE 100 index <
> had fallen 31.16 points to 3,832.83, after closing 2.9 percent higher on Monday for its sixth gain in seven sessions.The FTSE gained 6 percent last week buoyed by a slight recovery in sentiment on the outlook for the financial sector, but there was little to give the market clear direction.
"We have had a few days of positive moves and now the markets are looking for a catalyst for the next direction," said Tim Whitehead, strategist at Redmayne-Bentley. "At the moment I think we will just tread water for a while after the good rally that we've had."
Jitters on the demand outlook resurfaced ahead of U.S. housing starts data, which is due at 1230 GMT and expected to show a 16.8 percent drop to a record low.
This helped weigh down heavyweight energy stocks, although crude held at above $47 per barrel <CLc1>.
BP <BP.L>, Cairn Energy <CNE.L> and BG Group <BG.L> lost between 0.7 and 1.9 percent.
Royal Dutch Shell <RDSa.L> fell 2.6 percent after The Times newspaper reported analysts warned it was to scrap its share buyback programme and more than double its debt this year as it struggles to maintain spending commitments.
Mining stocks were also lower as base metal prices eased from sharp gains in recent sessions and investors booked in further gains.
BHP Billiton <BLT.L>, Anglo American <AAL.L>, Xstrata <XTA.L> fell 0.6-3.5 percent. But Antofagasta gained 1.3 percent despite being downgraded by Credit Suisse.
Rio Tinto <RIO.L> lost 3.5 percent with uncertainty about a proposed $19.5 billion tie-up with Chinese state owned Chinalco also driving the performance of the stock. A source close to the Chinalco transaction said it only needed a simple majority of shareholder support to go ahead. [
]
DEFENSIVE WEAKNESS
Cadbury's <CBRY.L> and British American Tobacco <BATS.L> pulled the index lower as investors booked profits after recent gains in defensive sectors. Cadbury's fell 3.4 percent while British American Tobacco was down 2.9 percent.
"There may be an element of profit taking going on in those kind of stocks and people looking to rotate into more growth-focused entities if there is a pull-back in the market," Whitehead said.
Better-than-expected results from Germany's analyst and investor sentiment index saw the FTSE briefly recover, but overall sentiment remained downbeat.
The ZEW rose unexpectedly in March to its highest level in over 1-1/2 years, boosting hopes Europe's largest economy will start recovering towards the middle of the year. [
]Banks were broadly higher, having recovered from earlier losses after American Express <AXP.N> said the number of people struggling to make credit card payments grew, casting doubt on the sector's ability to return to profit in the downturn.
HSBC <HSBA.L>, Barclays <BARC.L> and Lloyds Banking Group <LLOY.L> rose between 0.6-3.5 percent.
However, Standard Chartered <STAN.L> and Royal Bank of Scotland <RBS.L> lost 1.2 percent and 0.9 percent, respectively.
British banks <.FTNMX8350> gained 14 percent last week, as investors became hopeful that stability was returning to the troubled sector.
Britain wants banks to follow a code of practice aimed at making them more open about their tax liabilities, finance minister Alistair Darling said on Monday. [
]Investors were looking ahead to a two-day Federal Reserve meeting starting later in the day, and were also hopeful that the G20 meeting in London in early April may introduce measures to help speed the end of the recession. (Reporting by Farah Master; editing by Simon Jessop)