A look at some of the largest food factories in Britain.

Exclusive access to some of the largest factories in Britain to reveal production secrets.

Gregg Wallace and Cherry Healey follow the production lines making our favourite products.

Gregg Wallace and Cherry Healey visit some of the biggest factories in the UK.

Gregg Wallace and Cherry Healey get exclusive access to some of the biggest factories.

A look at some of the largest factories in Britain.

Gregg Wallace accesses the huge factories making our most iconic vehicles.

Gregg Wallace and Cherry Healey explore fascinating factory processes.

Paddy McGuinness and Cherry Healey visit factories that produce some of our favourite foods on a massive scale, from sliced bread to flapjacks and sausage rolls.