The French administration has moved to create an official country dancing diploma as part of a drive to regulate the fad. Authorised instructors who have been on publicly funded training courses will be put in charge of line dancing lessons and balls.

The rules, which come into force next year, come after the rapid spread of country and western in France, where an estimated 100,000 people line dance several times a week. Jean Chauveau, the chairman of the country section of the French Dance Federation, said: “It's growing at a crazy rate. There are thousands of clubs and more are springing up all the time.”