There are few things more infuriating than arriving home to a “Sorry we missed you”card after waiting hours for a delivery. A report last year from IMRG estimated that failed deliveries are costing retailers up to £780m, not to mention the frustration and inconvenience for customers who happen to be in the shower or out when the doorbell rings. It’s a problem that the co-founder of Ding, John Nussey, was inspired to do something about.