Three senior judges have referred the ongoing Kit Kat trademark dispute between confectionery giants Nestlé and Mars to the European Court of Justice. Swiss firm Nestlé, which manufactures the Kit Kat chocolate bar that has long been advertised with the slogan "Have a break. Have a Kit Kat", had attempted to register "Have a Break" as a trademark to prevent rivals from introducing a chocolate bar called "Break" or "Have a Break".