Manners and respect are the norm for kids here. Treating them like a nuisance won’t do anything to help France’s declining birthrate

In French culture, seven is known as “l’âge de raison”, the age at which children know right from wrong and can take some moral responsibility. France’s national rail operator, it seems, puts the age at which a child can be trusted to behave in a non-annoying way onboard a train a bit higher.

In launching its new Optimum plus tariff earlier this month, offering spaces onboard its weekday TGV trains between Paris and Lyon with bigger, more comfortable seats, fancy food and no under-12s, SNCF was trying to appeal to the many business travellers who make that journey. But the move has sparked a backlash and a philosophical debate about the place of children in society, against the backdrop of a worrying decline in French birthrates. “We can’t on one hand say that we are not having enough children and on the other hand try to exclude them from everywhere,” argues Sarah El Haïry, France’s high commissioner for childhood.

Helen Massy-Beresford is a British journalist and editor who lives in Paris