It does not matter so much whether the company is UK owned or not but whether UK jobs are maintained. Mars for example still maintains jobs in the UK but Kraft moved all of the production of Terrys chocolate abroad.
I don't have any issue buying chocolate made abroad per se as their are many decent non UK brands but what Kraft is doing is just plain sickening especially with the job situation in this country.
Cadbury is a healthy company and all that the debt mired Kraft are doing is trying to do is to remove competition and also improve its bottom end.
Like I said in the first few years not much will happen and give 5 to 10 years you will see what will happen to Cadbury in the UK.