The chain spent £7m for the initiative.
Domino’s has made investments to stockpile imported ingredients that might not be available if Britain leaves the European Union.
The pizza chain said in an earnings statement that a disorderly Brexit "carries the increased risk of disruption to raw material supplies."
The company imports about a third of its supplies from outside Britain including tomato sauce, frozen chicken, pineapple and tuna.
Domino's said it had spent £7 million to "implemented a series of measures to minimize the impact of supply chain disruption" because "the probability of this risk has increased."
"We expect the increased inventory level related to Brexit to be maintained into 2020," the company added.
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