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The benchmark FTSE 100 jumped 53.77 points - or one per cent - to reach 5,724.89, while major companies like BSkyB and National Grid also made gains, reports Reuters.
ARM Holdings offered the most impressive performance, enjoying a 4.4 per cent boost in share price after the British chip designer reported a 45 per cent rise in quarterly profit.
The company, which produces technology used in the iPad and iPhone, claimed its growth levels will continue to outstrip the industry.
Ian Williams, a strategist at Peel Hunt, said: "The balance of the newsflow has been a small net positive in terms of expectations ... the forecast risk for 2012 numbers isn't as great as it was."
UK gilts rose yesterday as investors looked for security amid worrying eurozone data.
Posted by Greg Secker
