Waitrose is preparing to roll out a mobile self-scan trial that allows customers to scan products on their mobile device and could eventually allow the full shopping experience to be done on mobile as it looks to stay at the forefront of innovation in the mobile payment space. The ‘scan as you shop’ mobile app is currently available on both Android and iPhone devices in three Waitrose branches. Any customer that is a member of the myWaitrose loyalty scheme can try out the service in the trial.