I own the blu ray specials, but I see no sign of region on the packaging (should be B) anywhere. Normally it means the blu ray is region free, but I can't be sure, since I live on the mainland in Europe, so it's the same region as the UK. But isn't there a possibility to return the discs if you buy the wrong edition? I seem to remember you can do that a couple of times with Amazon. Returning is always possible if something is wrong with the discs, but you also have the possibility of 'free' return once or twice, without any 'legitimate' reason, maybe you should check out if that's still possible.
Most Dvd players have a region free code installed. Check the internet as the information is freely available to turn on the region free code for your player. The only thing you'll need is the model number for your player. If you watch Dvd's on your pc just downlad VLC media player. It's free and region free. Hope this helps.