It works by shining intense light onto the avocado’s skin, which retracts back and discolours only the very top layer, meaning it does not damage the fruit.
Avocados are lasered with the shop logo, best before date, country of origin and product code for entering at the till.
M&S fruit technologist Charlie Curtis said: “When we first saw the technology in Sweden a couple of years ago, I knew we had to get involved.
“We’ve been following it for a while and are so excited to finally be launching it on avocados.
“Sustainability is at the heart of our business and the laser labelling is a brilliant way for us to reduce packaging and energy use.”