Talk of a takeover at BG Group, formerly British Gas, is driving the FTSE 100 up this morning and has helped to push the index back over the 4500 mark.
The benchmark index was up around 30 points or 0.7% within the first hour of trading to 4522, while the FTSE All-Share index is up 13 points or 0.6% to 2257.
Speculation of a takeover at BG Group by larger rival Total SA has pushed its share price up 11.5p or 3.6% to 328.5p.
And Tomkins, the world's largest maker of car wiper blades, has risen 3p or 1.1% to 271.5p after a ratings upgrade by Goldman, Sachs & Co.
In Asia, the markets in Japan closed at a 21-month high after strong news on Friday suggesting the economy could finally be improving.
The Nikkei 225 index climbed 21% to 11,271 points by 3pm close of business in Tokyo, led by huge exporter Tokyo Electron, and banking groups Mizuho.
And in the US on Friday, the Nasdaq technology stocks index was the only market to close down, as unemployment figures appear to have improved again and maintained the markets at their opening positions.
The Dow Jones gained just 3,78 points to 10,583.922 while the S&P 500 index close flat 1,144.94 and the Nasdaq Composite index fell 2,75 points or 0.14% to 2,029.82.IFAonline
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