The redevelopment of the bakery necessitated the closure of two existing bread plants at the site, according to a spokeswoman for the firm, who said that some of the equipment needed updating.
"The replacement of the old bread plants will help boost capacity and improve the quality of baked goods," she said.
As a result, the company launched a consultation period for employees over three months ago, which affected up to 121 jobs. The bakery confirmed last month that 45 employees have taken voluntary redundancy or early retirement, and the rest have been moved to alternative areas of the business.
Warburtons will now proceed with the site's makeover and introduce the new plant bakery, she said.