Also, Pink Floyd released a series of Immersion versions of many of their classic albums that contained demo / early versions of tracks.
Nice call on the immersion sets! I had forgotten about them. Those sound very interesting.
I'm a huge Floyd fan, but its a tough call to drop a C-note for each set, so I passed. Plus, I've acquired much of the material in the b@@tleg market.
I wish they would've done a nice rarities boxset with outtakes, BBC stuff, demos, etc. I'm amazed that songs like Scream Thy Last Scream still has yet to get a proper release. Or early live recordings of Cymbaline, Embryo, The Narrow Way, Atom Heart Mother, Fat Old Sun, etc which are much different than the studio versions.