The Crown Prosecution Service has asked police to obtain further evidence over allegations energy secretary Chris Huhne dodged a speeding penalty in 2003, it has been reported.
It has been alleged that he asked his then wife, Vicky Pryce, to accept the penalty points on his behalf in order that he avoid a driving ban.
The Lib Dem cabinet minister has denied the accusations.
Pryce claimed in a newspaper interview in May that the energy secretary had tried to pass on his points to her to avoid losing his driving licence.
The speeding offence is alleged to have taken place in 2003 when the then-MEP was driving home from Stansted airport after flying back from the European Parliament.
Huhne - who has since left Pryce for another woman - has denied the allegations.
The CPS has said the file, which relates to both Huhne and Pryce, will be assessed by a lawyer in its special crime and counter-terrorism division for a decision on whether charges should be brought.
This is the second time they have asked the police for further evidence as part of their assessment on whether or not there is sufficient evidence to bring charges.