To ensure that citizens complied with the Coronavirus lockdown introduced on March 17th 2020, the French government drew up legislation to make breaches of the rules a criminal offence. But lawyers and academics have raised concerns as to whether part of that legislation – which can lead to jail for anyone who breaches the rules more than three times in a month – is constitutional. France's top constitutional authority, the Conseil Constitutionnel or Constitutional Council, is due to rule on the issue in June. Meanwhile there have been more than 1,500 criminal cases involving repeat offenders and a number of people have already been jailed. Camille Polloni reports.