'Her entire fortune would double within a year, bringing her up to the 100 million pounds mark. Philip knows Kate has been looking for a way out of modelling for the past five years.'

The source added: 'She is bored silly with her own career and has vastly increased his Topshop sales and image. He promised her that she would be a big shareholder and partner when the deal was ready to roll.

'She's only confided in her closest friends because she still has outstanding contracts, and no one knows she met up with Simon and Green two weeks ago to sign and agree the final deal.'