Today Tomb Raider classics composer Peter Connelly has released a 31 track album entitled "Tomb Raider: The Angel of Darkness - Original Abbey Road Mixes (2002)". The downloadable package includes rare and unreleased material in MP3 format at 320kbps. In the words of the man himself:
"No game rips here!!! These are the raw and untouched final mixes direct from Abbey Road studios. Music written by Peter Connelly / Martin Iveson. Performed by the London Symphony Orchestra, June 2002." - PC
Various takes of the same cues that do not appear in game are present, and cut-scene scores that until now have remained rarities also make an appearance.
Follow this fetching link for collection via his soundcloud! Thanks to TudorTulok for the heads up.
Update 18th July 2012: A 32nd track, "Paris Intro FMV", has been added to the SoundCloud release. This marks the 10th anniversary of the recording sessions.