In 2001, when Jeffrey Archer was accused of having committed perjury in the 1987 trial, she appeared at the Old Bailey to defend him. Jeffrey Archer was subsequently convicted and imprisoned for perjury and perverting the course of justice. The trial judge, Mr Justice Potts, questioned the veracity of Lady Archer's evidence, suggesting that she too had perjured herself. However, no further action was taken. In 2003, she took her former personal assistant to court over an alleged breach of confidentiality. Lady Archer sought a permanent injunction against Williams, claiming she had stolen confidential documents about the family, and had planned to sell the information to the media. Williams had previously taken Lady Archer to an industrial tribunal over claims of unfair dismissal. Between 1991 and 1999 she sat on the council of Cheltenham Ladies' College. She sings first alto and in 1988 released a CD of Christmas carols, titled "A Christmas Carol". In 2011, she explained she had recently undergone major surgery for bladder cancer.