1990 commercial for Trebor Extra Strong Mints.

In 1824, John Cadbury began vending tea, coffee and, later, chocolate at Bull Street in Birmingham and sometimes in India. The company was known as “Cadbury Brothers Limited”. After John Cadbury’s retirement, his sons, Richard and George, opened a major factory in the purpose-built suburb of Bournville, four miles south of the city.

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 confectionery and beverage company Cadbury Schweppes (now Cadbury plc). In 1989, the company purchased Trebor Bassett, forming the UK confectionery subsidiary “Cadbury Trebor Bassett”.

As of August 2004, Cadbury Trebor Bassett had 3,000 members of staff in eight factories in the UK, including Bournville, Sheffield, Marlbrook and Somerdale.

In 2009, Cadbury Trebor Bassett was renamed Cadbury UK.

Info gleaned from Wikipedia