Using a mobile phone on a trip to the supermarket pushes up shopping bills by nearly 50 per cent, a study has found.
The research, by the University of Bath, found shoppers move round stores at a slower pace when they use their phones to keep up with messages, social media or calls.
They also wander along the aisles and come across extra products with each additional second in the supermarket - which equates to an extra 40p when it comes to the checkout.
Shoppers in one study added 45 per cent more items to their basket while using a phone, while participants in a second study added 58 per cent more.
This is believed to be because using a phone distracts people from their planned shopping lists and so-called ‘autopilot shop’, where consumers take a routine path to their regular items.