* FTSE 100 up 4.8 percent
* Oils lead as crude rallies on OPEC cut hopes
* Miners gain; U.S. stimulus package boosts growth hopes
* Banks, insurers bounce back
By Jon Hopkins
LONDON, Dec 8 (Reuters) - Britain's top share index <
> was up 4.8 percent at midday on Monday, led by strong gains in oils, miners and banks as hopes for a big U.S. economic stimulus package lifted sentiment in hard-hit sectors.At 1154 GMT the FTSE 100 index was up 192.75 points at 4,242.12, albeit below an earlier peak of 4,300.95.
The UK blue chip index closed 2.7 percent lower on Friday, making a 5.6 percent decline on the week.
"This is a short term relief rally against a backdrop of relatively cheap valuations," said Henk Potts, strategist at Barclays Stockbrokers.
"Medium term we will need more information to sustain the rally, and overall the mood will remain nervous," Potts said.
U.S. futures pointed to further gains on Wall Street after a strong turnaround on Friday with disappointing jobs data countered by Barack Obama's pledge for a big economic stimulus package.
Miners rose, bolstered by recovering commodity prices on hopes Obama's stimulus package will boost growth and help haul the United States, and the rest of the world, out of recession.
Shares in Vedanta Resources <VED.L>, Anglo American <AAL.L>, BHP Billiton <BLT.L>, Eurasian Natural Resources <ENRC.L> and Rio Tinto <RIO.L> took on between 5.5 and 12.2 percent.
Anglo American and Rio Tinto will this week announce they are slashing capital expenditure budgets for next year and delaying building new mines until demand for commodities recovers, the Financial Times reported.
Energy issues added the most points to the FTSE 100 index's gains as crude prices <CLc1> recovered from a recent slide on further hopes that next week's scheduled OPEC meeting will bring production cuts from the oil cartel.
BG Group <BG.L> jumped 8 percent higher, Royal Dutch Shell <RDSa.L> gained 6.6 percent and BP <BP.L> added 5 percent.
INSURERS, BANKS RALLY
Insurers gained strongly having been badly hit recently by the slide in equity markets on valuations and concerns over the impact of a recession.
Prudential <PRU.L> was the top FTSE 100 riser, up 14.1 percent, with Aviva <AV.L> ahead 9.4 percent and Legal & General <LGEN.L> up 2 percent.
Badly beaten-up banks also rallied, as investors looked to pick up some bargains, led by Barclays <BARC.L>, up 9.3 percent, with Lloyds TSB <LLOY.L>, Royal Bank of Scotland <RBS.L> and HSBC <HSBA.L> up between 3.6 and 6.3 percent.
There were only three FTSE 100 fallers at midday. Standard Chartered <STAN.L> lost 4.9 percent with its recent rights issue weighing, Liberty international <LII.L> fell 2.1 percent and Wood Group <WG.L> shed 0.5 percent.
Among the mid-caps, news that David Ross, a director of a number of companies had pledged some large shareholdings against personal loans unsettled a number of firms.
Shares in Carphone Warehouse <CPW.L>, which Ross jointly founded with Charles Dunstone in 1989, fell 3.5 percent on concerns Ross might have to sell his 19 percent stake.
Self-storage group Big Yellow <BYG.L>, where Ross, a director of the company, had also pledged 11.46 million of its shares against personal loans, lost 5 percent.
Bus and rail group National Express <NEX.L>, where Ross is chairman, shed 3.7 percent.
British producer prices and costs fell in November as oil prices and petroleum product prices declined sharply. (Editing by Jon Loades-Carter)