The management explained that existing plans to move production to Poland were too advanced to be realistically reversed, though assurances had been given regarding sustaining the plant.
Staff at Keynsham criticised this move, suggesting that they felt betrayed and as if they have been "sacked twice".
In October 2007, Cadbury announced the closure of the Somerdale Factory, in Keynsham, Somerset, formerly part of Fry's.
Between 500 and 700 jobs were affected by this change.
Cadbury was established in Birmingham, England in 1824, by John Cadbury who sold tea, coffee and drinking chocolate.
Dairy Milk chocolate, introduced in 1905, used a higher proportion of milk within the recipe compared with rival products. Cadbury was a constant constituent of the FTSE 100 on the London Stock Exchange from the index's 1984 inception until the company was bought by Kraft Foods in 2010.
By 1914, the chocolate was the company's best-selling product. Better transport access for milk that was inward shipped by canal, and cocoa that was brought in by rail from London, Southampton and Liverpool docks was taken into consideration.
Production transferred to other plants in England and Poland.
In 2008 Monkhill Confectionery, the Own Label trading division of Cadbury Trebor Bassett was sold to Tangerine Confectionery for £58 million cash.