The FTSE 100 Index has added 17.3 points, or 0.3%, to 5840.7 points this morning, led by British Airways.
British Airways has added 6p, or 1.6%, to 376.25 points after it said most US long-haul flights from London Heathrow airport and 70% of short-haul flights will likely operate today.
BP has advanced 4.5p, or 0.7%, to 619.5p. The oil producer gained permission from pipeline regulators to keep about a quarter of the oil flowing from the largest US oil field.
Anglo American has gained 25p, or 1.1%, to 2,328p and BHP Billiton has added 9p, or 0.9%, to 992p after copper for delivery in three months on the London Metal Exchange rose $95, or 1.2%, to $7,970 a metric ton.
Schroders has lost 13p, or 1.4%, to 950p after it said assets under management slipped to £122.3bn from £122.5bn in the first half.
In Japan, the Nikkei 225 Stock Average declined 65.89 points, or 0.4%, to 15,565.02 points after oil prices dropped by the most since May on speculation the terrorist threat to airlines in the UK will cut fuel demand.
Inpex dropped 30,000 yen, or 2.7%, to 1.09m, Nippon Oil fell 11 yen, or 1.2%, to 938 and Showa Shell Sekiyu, the Japanese refining unit of Royal Dutch Shell, declined 20 yen, or 1.4%, to 1,425.
Japan Airlines declined 3 yen, or 1.4%, to 207 and its competitor All Nippon Airways dropped 7 yen, or 1.6%, to 442.
Mitsubishi UFJ, Japan's biggest lender by assets, fell 30,000 yen, or 1.9%, to 1.58m after investors judged recent gains excessive.
In the US, the Dow Jones industrial average rose 48.19 points, or 0.44%, to end at 11,124.37 points, as a drop in oil prices and insurer AIG's solid profit outweighed concerns about the suspected plot to bomb US-bound planes.
American International Group, the world's largest insurer, jumped 3.1%, or $1.83, to $60.32 after it reported stronger-than-expected earnings. It was the stock's biggest one-day advance in more than a year.
Wal-Mart gained 2.3%, or 99 cents, to $44.89 and General Electric added 1.2%, or 39 cents, to $32.67.
Continental Airlines fell 1.5%, or 35 cents, to $23.86.IFAonline
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