Tesco has highlighted the introduction of queue-busting thermal imaging cameras as a key factor in a 10 per cent rise in half-year pre-tax profits to £1.09bn.
"We have heat-seeking cameras that sense the number of customers entering a store and predict the checkouts that need to be open," he said.
"We can monitor and manage the service more precisely by customer, by store and by the minute. Thanks to this, a quarter of a million more customers every week do not have to queue."
The Irisys cameras use sophisticated thermal imaging technology to measure and predict customers' arrival at checkouts, enabling managers to ensure that the optimum number of tills are open to deliver the best possible service to customers.
Infrared sensors above the checkout lanes detect the number and behaviour of customer groups at the checkouts.
The intelligent sensors automatically calculate the average queue length, average wait time and overall store performance against Tesco's One in Front customer service commitment.
Displaying real-time queuing data on the shop floor enables the retailer's management team to deploy multi-skilled staff to react quickly to potential queuing issues, according to Tesco.
Some parts of Atacama have not received rainfall for 500 years - but a sudden deluge of water upset the Desert's delicate biological balance
Spitzer Space Telescope could not spot Oumuamua, suggesting that it is actually pretty small
Greenland crater one of the 25 largest impact craters on Earth
This long-sought progenitor star was identified in an image captured by Hubble in 2007