The FTSE 100 Index has added 36.8 points, or 0.7%, to 5715.7 points this morning, led by mining companies.
BHP Billiton has added 1.4% to 997p and Vedanta has risen 1.8% to 1,274p.
BP has gained 0.7% to 623p after crude oil futures rose 0.7 percent to $72.69 a barrel in New York. A US government report showed stockpiles declined more than expected, as refineries increased output before the Fourth of July holiday.
In Japan, the Nikkei 225 Stock Average climbed 235.04 points, or 1.6%, to 15,121.15 points on speculation exporters can sustain profit growth amid higher borrowing costs in the US.
Banks climbed after the Wall Street Journal said Mitsubishi UFJ Financial Group is seeking to obtain a license to expand operations in the US into underwriting, investment banking and other services.
Mitsubishi UFJ climbed 40,000 yen, or 2.7%, to 1.57m, Sumitomo Mitsui Financial Group added 20,000 yen, or 1.7%, to 1.17m and Mizuho Financial Group rose 13,000 yen, or 1.4%, to 952,000.
Inpex Holdings, Japan's biggest oil explorer, advanced 32,000 yen, or 3.5%, to 946,000 and Japan Petroleum Exploration gained 200 yen, or 3%, to 6,950.
In the US, the Dow Jones industrial average gained 48.82 points, or 0.45%, to finish at 10,973.56 points yesterday, led by gains in the energy sector on rising oil prices.
Gains were tempered as investors hesitated to place major bets a day before the Federal Reserve's statement on the future direction of interest rates.
Exxon Mobil climbed 2.5%, or $1.47, to $61.12, while shares of rival Chevron rose 2.1%, or $1.26, to $61.36.
Intel jumped 3.4%, or 61 cents, to $18.66 after it said on Tuesday it would sell its money-losing communications processor business to Marvell Technology Group for $600m.IFAonline
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