LONDON —  Heather Mills is trying to prove Paul McCartney is worth much more than the $800 million he claimed in their divorce battle, the Daily Mail reports.

She has told friends she is employing a team of forensic accountants to examine her estranged husband's finances, the Mail says.

Such information, she hopes, will lead to the divorce ruling being overturned and see more money go to their 4-year-old daughter Beatrice, according to the Mail.

In her impromptu press conference after the divorce hearing at the High Court in London, Mills said: "We all know he's worth $1.6 billion. He's been worth $1.6 billion for the last 15 years."

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Mills, who was awarded a $48.7 million settlement, had recruited accountancy firm Lee and Allen in an attempt to discredit McCartney's own valuation of his wealth, the Mail reports.