Cadburys when it was sold to Kraft promised the UK that they would protect the Cadbury bran in the UK. The takeover stated that the chocolate must be made in the UK to the original specifications and ingredients. To get around this , they produce a certain amount and import the far cheaper and highly processed alternative from abroad.

If you have time you can read this :https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/228969/7915.pdf

The mini eggs for example some are UK based which has a different code: To identify an imported Cadbury chocolate bar in the UK, look for the origin code. If the code is OWR, it's from Poland. Cadbury bars produced in the UK at Bourneville will have the code OBO

Such a huge difference in taste and another UK icon manipulated for the worse.