Mary Archer evidence at the High Court in a libel case brought by her husband against the "Daily Star" newspaper, which claimed Jeffrey had slept with a prostitute called Monica Coghlan. During his summing up at the end of the trial, the judge, Mr Justice Caulfield, asked: "Has she elegance? Has she fragrance? Would she have, without the strain of this trial, radiance?" 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.
Jeffrey Archer eventually settled out of court, with Archer agreeing to pay the legal costs of around £30,000. Louth constituency had three key areas: Louth, Cleethorpes, and Immingham. During his time as an MP, Archer was a regular at the Immingham Conservative Club in the most working-class part of the constituency. In 1970 he took part in the Kennedy Memorial Test, a 50-mile running/walking race from Louth to Skegness and back. In parliament, Archer was on the left of the Conservative Party, rebelling against some of his party's policies. He advocated free TV licences for elderly people and was against museum entrance