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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Meghan and Harry spoke to Tom Bradby as part of ITV documentary, Harry & Meghan: An African Journey, which aired on Sunday at 9pm on ITV.
A resuming court hearing will rule on whether the Prime Minister upheld the law with his contradictory letters to the EU.
Some rain skirting southeast England on Monday, whilst many areas remain fine