The company said the transition to cage-free eggs has already begun in select markets in the US and Canada and will be completed across its 30,000 North American locations by 2025.

The announcement comes after a recent commitment from Subway to use only meat produced without any antibiotics in US stores, and its commitment to phase out battery hens in 2010.

“Serving food that reflects our commitment to the humane treatment of animals has long been a priority to our brand,” said Elizabeth Stewart, Director of Corporate Social Responsibility.

“We know how important it is for consumers to feel confident that the food they eat is ethically sourced, and our customers care deeply about animal welfare. As a result of this commitment, not only can you come to our restaurants for a great-tasting, quality, affordable meal, but our customers will be able to enjoy delicious breakfast sandwiches made with cage-free eggs.”

The brand continues to monitor layer hen housing research to identify future, best-practice menu and ingredient solutions that meet the highest standards of animal welfare.

“Subway customers across Europe are served only eggs from free range hens and in Australia are served eggs from cage free hens,” Ms Stewart said.

“Major menu changes like this take time, but we will keep our customers updated every step of the way as we work diligently with our suppliers to reach our goals. As more and more chains come on board with their commitment we want customers to remember you have ours.”