Perverting the course of justice carries a maximum sentence of life imprisonment, although the average sentence is around 10 months.
Both 58-year-old Chris Huhne and economist Vicky Pryce, 60, have been warned to be under no illusion about what punishment they face.
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Baroness Hale, 72, has campaigned for greater diversity in the judiciary in a varied career as an academic lawyer, law reformer and judge.