Officers also carry out baton charges as students, staff and parents march in cities including Paris, Marseille and Lyon

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Police have fired teargas at ⁠protesters as more than 250,000 pupils, teachers and parents demonstrated across France on the biggest day yet of a campaign for better high school conditions that has been marred by often violent clashes with police.

The French prime minister, Sébastien Lecornu, said at least 215 teenagers and 85 school staff had been injured since the protests began more than a fortnight ago, calling the figures “the heaviest ⁠toll in decades paid by the school system”.