French Prime Minister Jean Castex handed his resignation to President Emmanuel Macron on Monday, paving the way for a long-awaited cabinet overhaul and the likely appointment of the second woman to the job in 30 years.

Macron - who was re-elected in April and needs to show he has heard the frustrations of voters expressed in low turnout and big support for the radical far-right and far-left - has said he is looking for a premier with green and social policy credentials.