There are a number of subscription grocery delivery companies in the UK that work on a fixed delivery day model. i.e. you sign up and based on your address you'

There are a number of subscription grocery delivery companies in the UK that work on a fixed delivery day model. i.e. you sign up and based on your address you're given a day that all deliveries will happen on. This works by having fixed routes, known ahead of time, which optimise for local driver knowledge (it's supposed to be the same driver every week), and therefore can afford to be really quite cheap for delivery. I like the model and I'd like to see it applied to more types of food delivery.