Recorded Boston 20.02.1975.
The cover says Live in London for the two Eno contributions. The two tracks are probably taken from the session recorded by BBC on 26 February 1974 for the John Peel show.

Source: Hot Wacks Book XI. Published by Babylon Books, Thornlea East, Holme House Road, Todmorden OL14 8LD.(c) 1986 Blue Flake Productions, Inc., Page 265 & Appendix X.

Hot Wacks V, dated Feb. 10, 1978, lists Bitter Sweet as one of six Roxy Music releases available at that time.
Matrix / Runout: WRMB 344-A (Side A, runout)
Matrix / Runout: WRMB 344-B (Side B, runout)
Matrix / Runout: WRMB 344-C (Side C, runout)
Matrix / Runout: WRMB 344-D (Side D, runout)