Diane James has quit as leader of Ukip after just 18 days in charge.
The 56-year-old said it had become clear in discussions with party officials that she did not have "sufficient authority" to push through changes which she had planned.
Nigel Farage will continue as "acting Ukip leader" until a new leader is elected following the resignation of Diane James after just 18 days.
But he ruled out standing as leader himself, telling Adam Boulton on Sky News: "I've done my bit, I'm still very much a member of the party.
"But it is it is time for someone else to do the job."
He said he was sorry that James resigned, adding that he thought she had "all the qualities for the job".
Diane James has quit as Ukip leader before most people knew who she was. What happened?
Bill Etheridge, who stood against Diane James for leadership, said he was disappointed at her resignation adding she was supported by MEPs.
She has been in the role less than three weeks.