French opposition parties have said they will not back Prime Minister François Bayrou after he called a vote of confidence on 8 September on plans for deep budget cuts.

Bayrou, who has led a minority government since last December, called the vote on Monday, warning France was facing a "worrying and therefore decisive moment". "Yes, it's risky, but it's even riskier not to do anything", he said, in the face of France's mounting budget deficit.

From the National Rally on the right to the Socialists, Greens and France Unbowed on the left, opposition parties lined up to say they would vote against him.

Bayrou called the vote two days before protests have been called across France to "block everything".

The Bloquons tout movement, which began on social media but has since been backed by the unions and far left, emerged after Bayrou announced plans in July for almost €44bn (£38bn) in budget cuts.