GONG
London
Hammersmith Palais
4 May 1975

Line-up:
Steve Hillage
Didier Malherbe
Mike Howlett
Miquette Giraudy
Brian Davison 

setlist:
CD 1 (46:00)
1 Master Builder
2 Solar Musick Suite
3 Perfect Mystery
4 Flute Salad
5 Oily Way

CD2 (46:59)
1 ....You Can't Kill Me
2 Isle Of everywhere
3 You Never blow Your Trip Forever
4 Tropical Fish

lineage:
audience cassette recording -> wav -> flac

I got this (among some others - not Gong) in a box by a friend.
Although an original recording it doesn't sound very well, so
quality is B -> C.