Jenny, actually GOG really cleaned up Black Mirror. I have the DRM free Gamersgate version, but there is a horrible static noise that plays in several areas, even when using compatibility settings. I had to play the game with the sound turned way down and the subtitles on, which was far from ideal. I took a chance with the GOG version and was glad I did! There is no static issue whatsoever, which means playing the game is a much more pleasant experience. I definitely recommend the GOG version to anyone interested, as the one working version out there will be going away soon. I was even reading on the Steam forums that they have the old, static-y version, so it appears as though GOG's vanishing version is the only one that actually works properly.
Mad, let us know if you find out! I won't be replaying BM 2 for quite some time, as I had just played it before GOG got it in. If the package doesn't include BM 3, don't you have the disk version? If not, you can get it here -
http://www.amazon.co.uk/Black-Mirror-III...black+mirror+3. You're in the UK, right? I wouldn't be able to buy this version, but luckily, I already have it.
You could pick this one up if it turns out it's not in the GOG package.