Dominic Callaghan

Step inside the UK's fastest-growing grocery chain and discover how Aldi has managed to be named Britain's cheapest supermarket for three years running.

This behind-the-scenes documentary lifts the lid on Lidl, shedding light on how the shop keeps costs down and unpacking the secrets of the middle aisle.

Step inside the UK's fastest-growing grocery chain and discover how Aldi has managed to be named Britain's cheapest supermarket for three years running.