Supermarket depot workers and food manufacturers will be exempt from quarantine rules as the government tries to prevent food supply problems.
The move comes after the rising number of retail workers being forced to self-isolate began to affect the availability of some products.
The government said workers, regardless of vaccination status, could do daily Covid testing instead of isolating.
Up to 10,000 workers are expected to qualify for the scheme.
The new daily contact testing measures are beginning at 15 supermarket depots, followed by 150 depots next week, but they will not apply to supermarket store staff.