Radio Classic 21 + others
Westwood One radio
Radio broadcast from some bootleg
DVD v1 - Music Max (Australia )
DVD v2 - Jimmy TV (Italian)
DVD v3 - Wowow TV (Japan)
DVD v4 - Wowow TV (Japan)
Great special Xmas concert. The first audio is a fan made compilation called "A Night Up The Chimney" and mostly come from Radio Classic 21 (Belgium) and also VCD (r'n'r medley), bootleg "London 1975" and first gen tape from BBC broadcast. Worth it to hear.
Westwood One source sounds also great but are incomplete - BBTLB and last tracks.
All DVD's mostly are based on Rock Masters series source of this video. Second DVD from Italian TV channel use source from Rock Masters series but audio have full waveform unlike to v1 - up to 21kHz.
Version 4 is like 3rd but with Japan presenter before the gig and quality (video and audio, here 192kbps) is bit worser. This last dvd's come from some different low generation vhs tapes.
Wanted version: video from BBC broadcast Old Grey Whistle Test and others