Employees at French wine group H. Mounier have reportedly gone on strike to protest at the company's sale of flagship wine brand Calvet to Les Grands Chais de France.

H. Mounier, which sells a range of wines and Cognacs, is planning to sell Calvet, one of the best known wine brands in Bordeaux, according to French newspaper Les Echos yesterday (23 November).

No-one at H. Mounier was available for comment when contacted by just-drinks today.

Les Grands Chais de France is one of the country's biggest wine exporters, selling 17% of all French bottled wine exports. The company's J.P. Chenet brand is the world's best-selling French wine brand, with annual sales of 7.4m cases.

In September, the company signed a strategic alliance with California's The Wine Group to cover wine markets in the US and Europe.

The deal will see Les Grands Chais de France distribute wines from The Wine Group stable, including Gray Fox and Concannon, throughout Europe. The Wine Group will handle the French group's brand in the US.

Officials at Les Grands Chais de France could not be reached for comment as just-drinks went to press.