Tesco is launching a one-hour delivery service — a move that will enable the chain to go head-to-head with Amazon.

The U.K.-based supermarket giant introduced its new Tesco Now app, which enables shoppers in central London to choose from a range of 1,000 products, and have them delivered within an hour. Merchandise crosses categories such as fresh fruit and vegetables, meat, bakery goods and dairy, as well as pet, baby, health and beauty products.

Here’s how the service works: Shoppers use the app to select up to 20 items. Orders will be picked in a local store and delivered to customers — via moped — within 60 minutes. Customers will also be able to track their order status via the Tesco Now app, which also delivers live updates on the progress…