Overview: Show taped in London, England: --Procol Harum (hosts) - ""Conquistador,"" ""Whiter Shade of Pale,"" ""Grand Hotel,"" ""Fires Which Burn Brightly,"" ""Drunk Again,"" ""T.V. Caesar"" & ""Rule Brittania"" --Humble Pie - ""Oh La De Da,"" ""I Don't Need No Doctor"" & ""30 Days in the Hole"" --Alvin Lee and Mylon LeFevre - ""Rockin' Till the Sun Goes Down,"" ""Carry My Load"" & ""The World Is Changing"" --Steeleye Span - ""Cam Ye O-er Frae France"