This was George Harrison's fifth night performing with Delaney & Bonnie, the husband and wife act then on a brief tour of the UK.
Several of the shows were also recorded for possible album release - the result was 1970's Delaney & Bonnie & Friends On Tour With Eric Clapton. Harrison was credited as "Mysterioso".
This was, of course, a homecoming show for Harrison. Although he kept a low profile during the tour, he is known to have sung songs including Everybody's Trying To Be My Baby on at least one occasion.