Cabinet minister Chris Huhne has contacted Essex Police offering to help them with their inquiry into allegations he tried to evade punishment for speeding, his spokeswoman said.
Mr Huhne faces claims that he asked his then wife Vicky Pryce to accept penalty points on his behalf in 2003.
The Energy Secretary's spokeswoman said: "Chris Huhne contacted Essex Police to offer to help them with their inquiry.
"He will be speaking to them next week."
There have been reports that economist Mrs Pryce - whom Mr Huhne left last year for another woman - is prepared to confirm the allegations to detectives.
Essex Police said contacts would be made as part of efforts to establish whether any offence had been committed.
Detective Superintendent Tim Wills said: "There are many lines of inquiry to be taken and the team are still working to establish if an offence has been committed.
"Obviously this will entail speaking to key individuals identified by the inquiry team. It would not be appropriate to release any more information prior to progressing these lines of inquiry."
Earlier, Downing Street indicated that David Cameron still had confidence in Mr Huhne.
"The position on Chris Huhne has not changed," the Prime Minister's spokesman said. "He denies all the allegations on the issue."
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