After World War I, Cadbury Brothers Limited undertook a financial merger with J.S. Fry & Sons Limited. In 1969, it merged with Schweppes to form the International confectionary and beverage company, Cadbury Schweppes. In 1989, the company purchased Trebor Bassett and formed the UK confectionery subsidiary, Cadbury Trebor Bassett.
As of August 2004, Cadbury Trebor Bassett has 3,000 members of staff in eight factories in the UK, including Marlbrook, Bournville and Somerdale.
Cadbury Schweppes did not officially notify the Food Standards Agency until Monday, 19 June, 2006, shortly after which it recalled more than a million chocolate bars.
In December 2006, the company announced that the cost of dealing with the contamination would reach £30 million.
In April 2007, Birmingham City Council announced that it would be prosecuting Cadbury Schweppes in relation to three alleged offences of breaching health and safety legislation. An investigation being carried out at that time by Herefordshire Council led to a further six charges being brought. The company pleaded guilty to all nine charges, and was fined £1 million at Birmingham Crown Court - the sentencing of both cases was brought together. Analysts have said the fine is not material to the group, with mitigating factors limiting the fine being that the company quickly admitted its guilt and said it had been mistaken that the infection did not pose a threat to health.
On September 14, 2007, Cadbury Schweppes investigated a manufacturing error over allergy warning, recalling for the second time in 2 years thousands of chocolate bars. A Printing mistake at Somerdale factory resulted in the omission of nut allergy labels from 250g Dairy Milk Double Chocolate bars.