Former Cabinet minister Chris Huhne and his ex-wife are to stand trial next Monday over claims she took speeding points for him so he could avoid prosecution.
Huhne and his former wife Vicky Pryce were both charged last year with perverting the course of justice over the allegation, said to relate to a speeding offence in 2003.
Pryce previously pleaded not guilty on the grounds of marital coercion and Huhne today entered a not guilty plea to the charge.
The events which led to the charges date back to March 2003 when Huhne's car was allegedly caught by a speed camera on the motorway between Stansted Airport and London.
Both defendants are on bail and their trial at Southwark Crown Court is due to start next Monday.