* FTSE gains 0.7 pct as UK corporate results impress
* Reed Elsivier tops risers as it beat expectations
By David Brett
LONDON, July 29 (Reuters) - Britain's top shares gained on Thursday as a deluge of upbeat earnings from the UK's top firms lifted investor sentiment, with Reed Elsevier <REL.L> the top performer after its first-half results topped expectations.
By 1037 GMT, the FTSE 100 <
> was up 38.00 points at 5,357.68 index, having closed down 45.99 points at 5,319.68, on Wednesday."Company earnings are coming in thick and fast and the general theme so far has been one of outperformance," said Joshua Raymond, market strategist at City Index.
Reed Elsevier topped the FTSE 100 <
> risers list, adding 5.8 percent, after the publishing and events group posted forecast-beating first-half results. [ ]Strong results helped drugmaker AstraZeneca <AZN.L> rise 4.4 percent, as the firm doubled its 2010 share buyback programme and received an endorsement from a U.S. advisory panel for its potential blockbuster heart drug Brilinta. [
]The defence sector enjoyed good gains, with Rolls Royce <RRS.L> up 0.7 percent as the engine and turbine maker reported a stronger than expected first-half profit and raised its full-year forecasts. [
]Europe's largest defence contractor BAE Systems <BAES.L> climbed 2.3 percent after posting a 14 percent rise in first-half earnings and a bullish outlook. [
]Aerospace electronics group Cobham <COB.L> added 1.2 percent as it said it won a prime contract with the U.S. missile defence agency. [
]Telecoms were also higher as BT <BT.L> unveiled a 6 percent rise in first-quarter adjusted core earnings. [
]Vodafone <VOD.L> rose 1.2 percent as talk turned to plans for an initial public offering by the Indian telecoms venture between the British mobile telecoms provider and Essar Group, which Essar said are at an initial stage. <ID:nSGE66S0FF>
HEAVEYWEIGHT SUPPORT
The energy sector reversed early losses as investors digested Royal Dutch Shell's <RDSa.L> second-quarter results. [
]Europe's largest oil company, which rose 1.0 percent, also said it would boost asset sales, echoing a strategy announced earlier this week by rival BP <BP.L>, which gained 0.5 percent.
Banks were rallying, having paused for breath in the previous session after recent strong gains which followed relief after Europe's recent stress tests.
Lloyds Banking Group <LLOY.L> and Standard Chartered <STAN.L> were up 0.9 percent each.
The FTSE was back on the front foot after Wednesday's session pared gains made over the previous week but traders warned the rally could be short-lived.
"We are not really seeing the market break new highs despite some decent corporate results. We have been here before and retraced quite sharply," said Geoff Wilkinson, head of research at Mint.
On the downside, Rexam <REX.L> was the standout faller, shedding 2.6 percent after Credit Suisse cut its rating for the drink-can maker to "neutral" from "outperform" following the firm's first-half results on Wednesday.
BSkyB <BSY.L>, which is considering a proposed takeover from its largest shareholder News Corp <NWSA.O>, was down 0.8 percent as it reported fourth-quarter figures and said full-year results would be in line with forecasts.
The world's second-biggest cigarette maker British American Tobacco Plc <BATS.L> dropped 1.0 percent after Morgan Stanley cut its recommendation to "equalweight" from "overweight" after Wednesday's results.
In the U.S., Wall Street futures pointed to a firmer start, with the main data of interest in the afternoon the latest weekly jobless claims, due at 1230 GMT. (Editinb by Karen Foster)