Deliveries from Booker's Hampshire warehouse have been disrupted after an Ocado depot on the same industrial estate caught on fire.
Neil Odin, chief fire officer at Hampshire Fire and Rescue Service, said firefighters were forced to cut holes in the roof of the warehouse to tackle the blaze because it was not designed for humans to work in.
Fire crews from neighbouring services were dispatched to provide support for what was a challenging and complex incident.
Ocado said on Tuesday the fire started in the Andover plant in the ambient grid, the section for food items that can be stored at room temperature. "Due to concerns over the presence of pressurised refrigerants on site, the police conducted a limited evacuation of the immediate area on Wednesday evening".
The fire was declared a major incident as it swept through the Ocado warehouse and locals were urged to keep their windows and doors shut due to the smoke.
The removal of those materials has now been completed and the fire is no longer classified as a major incident, so local residents and workers have been able to access the affected area as normal.
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According to reports, the Duke of Edinburgh was subsequently offered " suitable words of advice " by a Norfolk police officer. The duke was forced to follow standard police procedure and take a breath test.
Hampshire Fire and Rescue Service said four firefighters had been treated for slight smoke inhalation.
"We apologise to all those affected by this incident and are very thankful to the people of Andover for their understanding and support during this hard period".
Ocado added that it was working to minimise disruption for customers by increasing capacity at its three other major United Kingdom facilities. Makes you truly appreciate the fearless men and women of the Fire Service!
Shares in United Kingdom online supermarket group Ocado slumped Wednesday after a fire ripped through a company warehouse operated by robots.
Ocado stressed it had comprehensive insurance for the property, stock and equipment and for business interruption losses.
A major fire which has destroyed one of Ocado's flagship robotics distribution centres has been extinguished this afternoon, putting an end to a three-day inferno at the firm's Andover site.
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