* Miners extend previous session's gains
* BP top blue-chip faller after Q4 misses expectations
* Pubs boosted by upbeat Merrill note
By Tricia Wright
LONDON, Feb 2 (Reuters) - Britain's top share index was 0.4 percent higher in midday trade on Tuesday, as solid gains from miners, buoyed by positive broker comment, outpaced weak energy stocks pressured by disappointing results from BP <BP.L>.
By 1200 GMT, the FTSE 100 <
> was up 18.90 points at 5,266.31, after closing 58.89 points, or 1.1 percent higher on Monday."Some of the concerns which have come into the market in recent weeks may be being overly amplified," said Peter Dixon, economist at Commerzbank.
"And then we get a positive surprise like yesterday's ISM (manufacturing) number out of the U.S. and obviously the world looks a brighter place for equity investors," he said.
Miners added the most points to the index, extending the previous session's solid gains, with Rio Tinto <RIO.L> up 3.1 percent aided by a Citigroup upgrade to 'buy', and Anglo American <AAL.L> putting on 2.4 percent after SG Securities lifted its rating on the stock to 'buy'.
Eurasian Natural Resources <ENRC.L>, Kazakhmys <KAZ.L> Lonmin <LMI.L> and Xstrata <XTA.L> added 3-4 percent, with the demand picture helped by the stronger U.S. manufacturing data.
Australia's central bank shocked markets by not raising interest rates for a fourth consecutive time, citing the impact of higher mortgage rates at home while noting tighter policy in China and concerns over sovereign debt abroad. [
]Banks were in demand, extending their rally from the past two sessions, with Standard Chartered <STAN.L>, Barclays <BARC.L>, Royal Bank of Scotland <RBS.L> and Lloyds Banking Group <LLOY.L> putting on 0.2-3.2 percent.
ENERGY DRAIN
Energy stocks were in the doldrums, with BP the standout FTSE 100 faller, off 4.5 percent, after missing forecasts with a 33 percent rise in fourth-quarter replacement cost profit and saying an operational turnaround could slow. [
]Peer Royal Dutch Shell <RDSa.L>, set to report on Thursday, fell 0.1 percent.
Among individual movers, Reckitt Benckiser <RB.L> shed 2.2 percent after Credit Suisse cut its rating for the household products firm to 'neutral' from 'outperform', mainly on valuation grounds. [
]On the second line, pub operators found good support after BofA Merrill Lynch reiterated its positive stance on the sector following an upbeat conference it hosted on Monday, helping drive an ouperformance by the FTSE 250 <
> index over blue chips.Marston's <MARS.L> climbed 3.4 percent, while Enterprise Inns <ETI.L> added 3.2 percent, and Punch Taverns <PUB.L> firmed 2.3 percent.
In terms of data, the only U.S. pointer of real interest will be December pending home sales, so attention will remain directed on Thursday's Bank of England interest rate decision and the December U.S. jobs report on Friday. (Editing by Dan Lalor)