Sort of still on topic, I reckon I've cracked the €1 Occitanie tickets. If you wait till 11pm UK time and then search the oui.sncf website for three weeks time you'll find some great deals eg: Elne to Béziers €1 with big choice of trains, usual fare €18.50. But by midday next day they've all gone. Also if booking for say three people beware, they often come up with two x standard fare plus one €1 fare, eg: Elne to Béziers for three is €38. To get round this just book three separate tickets, tedious but saves €35!! NB you have to travel on a specific train on the Cerbere to Avignon route but some routes are just €1 flat fare so ticket valid on any train that day.