This thread bump was a depressing reminder about this whole episode. I lived just down the road from the Keynsham factory as it was being taken over by Kraft. Cadburys had been threatening to close it for a few years before the proposed sales and there was lots of animosity towards Cadburys in the area anyway.
Then when Kraft came in under the promise of keeping all the jobs and then immediately sacked everyone and moved the sale to Poland there was a mass boycott of Cadburys and Kraft goods from everyone I knew. Was my first real introduction to that kind of product boycott where everyone would be checking labels to see who was producing things.
I moved away to go to uni and most people there thought I was very weird for boycotting Cadburys. Can't say I'm particularly militant about checking labels for it anymore, but I still don't intentionally buy Cadburys goods.