The source said: “The judgment has been made. The parties received their copies this week. 

“On an analysis of the case law, Mills was always going to receive around £25million. I think it’s fair to say the judge has not erred from that.”

Experts had predicted the former model would secure between £20million and £30million, making it one of the largest divorce payouts in British legal history.

One expert said: “She had initially been offered around £10million so it is somewhat of a compromise.

“The judge has had to consider such questions as security for Ms Mills and arrangements for their  daughter. 

“What will be really interesting is what the judge decides in terms of publicity for his ruling.

“He has the option of making all or parts of the settlement public if he deems it in the public interest. Alternatively, the whole ruling could remain confidential.”

Sir Paul hired two of the top legal brains – Nicholas Mostyn QC and Fiona Shackleton – for the case.

Ms Mills chose to represent herself in the six-day divorce hearing last month. This was after she parted company with lawyers Mischon de Reya. 

She now faces a demand from them for about £2million in fees for preparatory work.