By Dominic Lau
LONDON, April 15 (Reuters) - The UK's FTSE 100 <
> index rose by midday on Tuesday, breaking a five-session losing run as AstraZeneca <AZN.L> leapt on a patent settlement and oil shares gained on record crude prices. AstraZeneca jumped nearly 9 percent, on course for its biggest one-day percentage gain since November 2002, after the Anglo-Swedish drugmaker said it had settled U.S. patent litigation against India's Ranbaxy Laboratories <RANB.BO> over its top-selling drug, ulcer pill Nexium.By 1023 GMT, the FTSE 100 <
> was up 47.4 points at 5,879.0, having fallen 1.1 percent on Monday.Oil shares also rose as crude prices <CLc1> surged to record highs and after a large offshore Brazil find by BG Group <BG.L> and its partners, Petrobras <PETR4.SA> and Repsol-YPF <REP.MC>, which may be the world's biggest discovery in 30 years.
BG Group rose 5.7 percent, while Royal Dutch Shell <RDSa.L> gained 1.2 percent and Cairn Energy <CNE.L> added 2.2 percent.
BP <BP.L> put on 0.5 percent after China had accumulated a stake of just under 1 percent in the oil major.
Investors will be keen for further clues on the health of the world's largest economy, with U.S. producer price index data due at 1230 GMT.
A survey showed British like-for-like retail sales fell in March for the first time in two years and at the sharpest pace in nearly three years, in a sign consumers are feeling the impact of the credit crunch.
"We are seeing a lot of impact on the real economy coming in in the next six months, a lot of downgrades particularly in economically sensitive areas, consumer services and industrial particularly," said Roger Cursley, UK strategist at Investec.
"We think (earnings growth) forecasts have to come down quite a bit. It'll be difficult for the market to make much headway against that," said Cursley, who cut his year-end target for the FTSE 100 to 6,250 from 7,000 on Monday.
Tesco <TSCO.L>, however, said it had made a strong start to its new financial year after meeting forecasts with an 11 percent rise in annual profit. Tesco advanced 5.3 percent, while Wm Morrison Supermarkets <MRW.L> added 1.4 percent and Sainsbury <SBRY.L> gained 1.1 percent.
CARPHONE SLUMPS
Carphone Warehouse <CPW.L> slumped 12.5 percent after the company released mixed results, gave a weaker 2009 outlook and marginally revised down its 2008 full-year pretax profit.
Also on the economic front, the Royal Institute of Chartered Surveyors reported the most widespread fall in UK house prices in March in the 30-year history of the survey, while the government said annual British house price inflation eased to a 19-month low of 6.7 percent in February from 8.0 in January.
Housebuilder Persimmon <PSN.L> dropped 2.9 percent, while rivals Taylor Wimpey <TW.L> and Barratt Developments <BDEV.L> both lost 3.6 percent.
Diversified healthcare company Johnson & Johnson's <JNJ.N> first-quarter earnings will also provide a further gauge of the impact of the credit crisis on corporate earnings later in the day.
Miners were also in demand, with Eurasian National Resources <ENRC.L> up 2.9 percent, Rio Tinto <RIO.L> gaining 2.2 percent and BHP Billiton <BLT.L> adding 2.1 percent.
Banks were weaker, with Barclays <BARC.L>, Royal Bank of Scotland <RBS.L>, HBOS <HBOS.L>, Lloyds TSB <LLOY.L> and Alliance & Leicester <ALLL.L> down. (Additional reporting by Michael Taylor; Editing by Paul Bolding)