Despite the caricature of her as an "ideologue", she was "one of the most complex" political figures of her age, argued Mr Clegg, and "much of her politics was subtle, pragmatic, sometimes driven by events".

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Whatever the precise numbers, they're clearly more complex than the simple figures being bandied around by the pipeline's corporate and political backers might imply.

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Other functions solve complex mathematical equations, plot scientific figures or chart natural events.

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It is true that the raw figures hide a far more complex story, both about Christianity and secularism.

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These paintings were a source for Piero della Francesca's cycle on the same subject, painted in Arezzo in the middle of the following century, though Gaddi, with happy disregard for realism in scale, hardly anticipates the rigorous perspective and complex geometry of Piero's work, not to mention its cold, clear atmosphere or the figures' graceful stillness.

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However, British sports business expert Simon Chadwick argues that these figures do not show the whole picture -- and he insists that brand value is more complex than mere numbers can portray.

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