Morrisons has said that it will become the only supermarket to be completely supplied by net-zero carbon British farms by 2030, five years ahead of the rest of the market.

It expects that the first products to reach net-zero carbon status will be eggs in 2022, followed by lamb, fruit, vegetables, pork and beef in the years to follow.

"It’s years ahead of industry expectations – and an ambitious target – but it’s our duty to do it," said chief executive, David Potts.