Just it sounds the swoosh of wheels from 1,100 waist-high cuboid swarm robots, zipping along a grid system the size of several football pitches. The robots collect groceries from crates beneath them, and drop them off at a packing station.
Occasionally they would all simultaneously come to a halt, green lights blinking, awaiting their next command, received via an unofficial 4G network custom-built by Ocado.
Underneath them, side-by-side with humans, another robot consisting of only one arm was being trained to pack the goods gathered by the swarm to fulfil individual orders.
The chill the temperature was to protect the cold food. There’s a good reason why data centres full of computer servers are often built inside icy mountains or under oceans. Electronics get hot.
Ocado is a significant tech firm that has invested millions in developing robotics with the ambition of becoming a people-free platform.
That means that from the moment you place your online order to the moment it arrives at your door (via a driverless van of course), there will be no human intervention.
The plant process 65,000 orders per week.
This technology was described as part-robot, part-phone, because of their 4G communications.