Heather Mills is set to sue the News of the World over their claims that she worked as a prostitute.

The newspaper reported that Mills charged up to $8,000 (GBP4,400) for sex sessions in hotels with rich clients. They also claimed she had partaken in lesbian sex with another prostitute.

Sir Paul McCartney's estranged wife plans to concentrate on the legal proceedings once her divorce is finalised.

Her lawyer said: "Heather is very distressed by this article. She continues to recover slowly from her revision amputation operation and has suffered weight loss, anxiety and sleeping problems as a result of the stress and anxiety of the break-up of her marriage. The coverage of this in certain newspapers has caused further distress and illness to her."