Hudl has been a huge success for Tesco. But it was another Tesco initiative that really caught the eye - quite literally. On 2 November, The Grocer revealed that Tesco was using advertising screens at its petrol stations capable of scanning the faces of customers and then running advertising based on their sex and demographic. The fact Lord Alan Sugar’s Amscreen was behind the OptimEyes technology gave added credence to a story that sounded more at home in a sci-fi film than on a petrol forecourt. And some critics rounded on Tesco for using big brother tactics to drive sales.

Read The Grocer’s Review of the Year 2013.