* FTSE 100 falls 4.4 pct at midday
* Energy stocks, banks slump
* BoE expected to cut interest rate
By Harpreet Bhal
LONDON, Nov 6 (Reuters) - Britain's leading share index fell 4.4 percent by midday on Thursday, weighed down by energy and banking stocks, ahead of an expected interest rate cut by the Bank of England.
By 1110 GMT, the benchmark FTSE 100 <
> had lost 203.34 points to 4327.39.Energy firms were weak, as crude oil <CLc1> dipped 1.8 percent to close to $64 a barrel. BP <BP.L>, Cairn Energy <CNE.L> and Royal Dutch Shell <RDSa.L> fell between 3 and 4.3 percent.
Banking stocks were lower, ahead of the BoE's rate-setting meeting later on Thursday. Analysts expect the central bank to cut the interest rate by at least half a percentage point from 4.5 percent, to spur a faltering domestic economy. The BoE is due to announce its decision at 1200 GMT.
Peter Dixon, UK economist at Commerzbank, said the market has already priced in a rate cut, explaining the lack of a rally on the back of rate cut anticipation.
"(The FTSE) is falling at a significant pace. It does look a bit overdone ... It is the kind of situation we would expect at a time of extreme financial unrest," he said.
"A rate cut is not going to prevent the UK from falling into recession."
Hedge fund Man Group <EMG.L> fell 29 percent, making it the highest loser on the index. The company reported a 24 percent fall in pretax profit to $622 million in the six months to end-September due to a drop in performance fees and amortisation charges.
Private equity group 3i <III.L> also retreated, falling by 9.9 percent, after the firm said first-half revenues from company disposals were down 43 percent as the credit crisis had made it difficult to sell companies in which it had invested.
Miners fell, tracking downward pressure on metals prices as the dollar climbed. Vedanta Resources <VED.L> slipped 10.4 percent, after the India-focused miner posted a 24.7 percent drop in first-half profit to $350 million, but said it was well placed to cope with lower metal prices.
BHP Billiton <BLT.L>, Rio Tinto <RIO.L>, Xstrata <XTA.L>, Lonmin <LMI.L> and Kazakhmys <KAZ.L> shed between 5.9 and 10.4 percent.
HOUSE PRICES PLUNGE
The BoE's interest rate decision comes at a time when British house prices are plunging further. House prices fell by a record 14.9 percent on the year in October, the Halifax house price survey showed. [
]Credit Suisse analyst Jonathan Pierce warned that British banks could face deterioration in conditions through to the first quarter next year.
Pierce said in a note that the deterioration "will be relatively severe" as the global credit crisis affects markets and the economy. Royal Bank of Scotland <RBS.L> could face losses this year and next, he said.
RBS fell 4.1 percent, while HSBC <HSBA.L> sank 7.3 percent.
Among other losers on the index was British technology group Invensys <ISYS.L>. The stock fell 12.2 percent, as the company's first-half operating profit missed analysts' forecasts.
On the upside, shares in Anglo-South African insurer Old Mutual <OML.L> climbed 4.3 percent to become the top gainer on the FTSE 100, after the company unveiled plans to derisk its troubled U.S. life business and appointed former Prudential <PRU.L> finance chief Philip Broadley as its new finance director.
(Editing by Erica Billingham)