* FTSE 100 up 0.7 pct; Fed rate decision welcomed
* Strong results lift BSkyB, Unilever, AstraZeneca
* Worries over euro zone debt crisis ease
By Tricia Wright
LONDON, April 29 (Reuters) - Britain's top share index rose on Thursday as investors welcomed a pledge by the U.S. Federal Reserve to keep rates low and as nervousness about the euro zone debt crisis eased, with strong corporate results also helping.
By 1117 GMT, the FTSE 100 <
> was up 39.46 points, or 0.7 percent, at 5,626.07, rebounding after a 0.3 percent decline the previous session, and Tuesday's 2.6 percent tumble.Pay TV firm BSkyB <BSY.L> rose 5 percent as its results showed huge demand for high definition services which enabled it to add 62,000 net new customers in the third quarter of the year and increase user loyalty. [
]Unilever <ULVR.L> also shone, adding 3.6 percent after the consumer goods giant's drive to increase volume growth paid off for the fourth quarter in a row as it beat forecasts with a rise in underlying sales in early 2010. [
]Drinks producer Diageo <DGE.L> climbed 2.4 percent as French peer Pernod Ricard <PERP.PA> lifted its full-year profit target and posted third-quarter sales above forecasts, with key markets such as the United States, Russia, as well as duty free improving.
ECB Governing Council member Axel Weber said Thursday the impact of any Greek debt default on other states would be "incalculable" and urged quick approval of an aid package to prevent market upheaval and contagion to other states. [
]And the Fed on Wednesday gave an upbeat assessment of the world's largest economy and decided to keep interest rates near record lows. [
]"If the Fed had said, look, we're going to raise interest rates, the market would be down considerably today," said Mike Lenhoff, chief strategist at Brewin Dolphin.
"Things are moving in the right direction as far as the euro zone is concerned, so the crisis aspect of Greece's public debt problem I think will find a resolution fairly quickly... and then (there's) the corporate results -- they just reflect the improving momentum in the global economy."
Banks were mostly higher as some reassurance on the outlook for euro zone debt improved sentiment towards the sector.
Barclays <BARC.L>, Standard Chartered <STAN.L> and HSBC <HSBA.L> rose 0.3-0.7 percent, though Royal Bank of Scotland <RBS.L> and Lloyds Banking Group <LLOY.L> shed 0.4 and 1.2 percent.
Elsewhere among financials, insurer Standard Life <SL.L> put on 3.3 percent after it beat forecasts with a 30 percent jump in first-quarter sales, prompting Panmure Gordon to upgrade the stock to "buy" from "hold".
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AstraZeneca <AZN.L> climbed 2.2 percent after it smashed forecasts with a 28 percent rise in first-quarter earnings per share, helped by growing sales of cholesterol drug Crestor and a lower tax rate. [
]And peer Shire <SHP.L> added 0.6 percent after posting better than expected first-quarter earnings as new drugs continued to offset loss of exclusivity for its blockbuster ADHD medicine Adderall XR.
GlaxoSmithKline <GSK.L>, meanwhile, rose 0.7 percent.
Energy firms were the main drag on the index with BP <BP.L> down 1.4 percent as the U.S. Coast Guard said on Wednesday that five times as much oil as previously estimated was leaking from a well beneath the site of a deadly drilling rig explosion.
Peer Royal Dutch Shell <RDSa.L> fell 0.7 percent having been boosted by strong Q1 results on Wednesday.
BG Group <BG.L>, however, gained 2.3 percent after it delivered improved quarterly output and underlying profits, even though weak gas prices took a toll on its bottom line. (Editing by Mike Nesbit)