Nestle and Coca-Cola are among the companies squaring up to European Union law-makers over new requirements for food labels.

Requirements handed down by Brussels state that nutrition information should be displayed in writing at least 3mm high on food labels.

However, the regulations have been slammed as “impractical” and “a burden to manufacturers” by opponents, who claim the expanded lettering means the panels are so large they obscure brands and logos.

“What the [EU] Commission is proposing is disproportionate - in more ways than one,” Susanne Doring of the Confederation of the Food and Drink Industries of the EU (CIAA) told the Daily Mail.

“The CIAA already endorses a voluntary GDA system and we welcome the recognition of this approach in the Commission proposals. But it's no good if you then enforce information which is too big to fit on the smaller-sized food containers. More flexibility is needed… and any new legislation must take account of the space constraints on smaller packs.”

A spokesman for Coca-Cola added: “It becomes confusing to read and we don't believe this is helpful when a successful voluntary labelling system is already in place and working well.”