Here's a list of businesses (and their ratings) in the Manufacturers/packers category.
In England, Wales and Northern Ireland food hygiene ratings are provided by the The Food Hygiene Rating Scheme (FHRS). Ratings in Scotland are provided by a similar scheme called the Food Hygiene Information Scheme (FHIS).
You can read more about FHRS and FHIS food ratings here.
Click on a establishment below for more information:

Total Score: 0 (lower is better)
PERFECT HYGIENE RATING SCORE
1 Atholl Road, Chelmer Village, Chelmsford, CM2 6TB

Total Score: (lower is better)
2 Brewery Fields, Church Street, Great Baddow, Chelmsford, CM2 7LE

Total Score: (lower is better)
Phillows Farm, Hammonds Road, Little Baddow, Chelmsford, CM3 4BG

Total Score: 15 (lower is better)
Unit 3, Bell Works, Well Lane, Danbury, CM3 4AB

Total Score: (lower is better)