Sodexo has been awarded Red Tractor status at 450 of its sites spread across the education, healthcare and defence sectors.
The award means all milk, cream, fruit and vegetables used at those sites will meet Red Tractor standards and will be fully traceable from field to fork.
It also means the caterer's suppliers, processing plants and, where relevant, animal welfare, will have been independently inspected.
In season, 80 British farmers will be providing 80 listed lines of fruit and vegetables to Sodexo.
Michelle Hanson, commercial director, Sodexo UK and Ireland, said: "It is incredibly important for us to support British farmers as much as possible and, via the Red Tractor scheme, we are able to provide customers with a guarantee that their food has reached their plate from the most ethical and sustainable British sources."
The caterer recently announced plans to roll-out its ethical beverage range, Aspretto, globally.
As a school meals supplier it has also achieved Marine Stewardship Council accreditation.
Sodexo has also signed a global deal with Virgin Atlantic for the provision of a range of catering services to the airline's Clubhouses in the UK, USA and South Africa. The three-year deal commences on 1 August.
By Chris Druce
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