Supermarket queues could be a thing of the past with a'pocket checkout' system that allows shoppers to scan items using their phone camera. Barclaycard's new system of in-store paying allows people to pay for goods while wandering around the store - meaning no need to go via checkout. The company is already testing the technology at the canteen at its Canary Wharf headquarters with another retailer to offer the technology later in the year. Barclaycard's new'Grab and Go' technology (pictured) allows shoppers to scan all their items using their phone before walking out the shop without having to queue at checkout Instead of going to the checkout, shoppers could scan their items using their phone and then walk straight out the shop. The technology could either operate through the Barclays app or be integrated into the retailer's app.