(Telegraph) - The creators of some of France’s finest wines are up in arms over a government plan to double the size of a warning on bottle labels advising pregnant women to avoid alcohol.

A quarter of French mothers-to-be continue to drink alcohol, according to the National Institute for Health and Medical Research, and the government says the warning needs to be larger to increase awareness of the dangers.

But furious winegrowers in Bordeaux say the move is unnecessary, complaining that they were not consulted. The warning consists of the silhouette of a pregnant woman holding a glass inside a red circle with a diagonal line through it. The government wants to enlarge it to a minimum of 1 centimetre instead of 0.5 cm as at present.