The date was July 10, 1973. Here's the info.
Rainbow Theatre, London
Band recording
Miles Davis Septet
Miles Davis (tpt, org); Dave Liebman (ss, ts, fl); Pete Cosey (g, perc); Reggie Lucas (g); Michael Henderson (el-B); Al Foster (d); James Mtume Foreman (cga, perc)
First set
Turnaroundphrase (M. Davis) 11:55
Tune in 5 (M. Davis) 10:24
Unknown title 730620 (M. Davis) (with applause, announcement) 21:27
Second set
Right Off (M. Davis) 13:38
Ife (M. Davis) 20:50
Calypso Frelimo (M. Davis) (incomplete) 12:18
Cut off at 12:18.
Commentary by Peter Losin:
This recording was probably made by one of the band members, since musicians' voices are audible at several points (9:20, 10:38, 16:50 of "Unknown 730620" and 9:59 of "Right Off"); and Davis can be heard tapping out the tempo for "Ife" at 0:03-0:08.