Re. Genie's message above.

There was a spate of long 45 rpm single releases spanning six or seven minutes in the UK in the last few years of the 1960s. 'America' by The Nice springs to mind as does, and I wish I wasn't able to remember this, Richard Harris's version of 'MacArthur Park', plus, of course, 'Hey Jude'. Some bands got around this by recording singles in two parts, one on the 'A' and the other on the 'B' side. Perhaps the most best known was Fleetwood Mac's 'Oh Well', though the second side was obviously geared towards recorder fans.

In terms of track length of albums, I don't think it's fair to include the Hayes/Cahill live track as that was a CD release. The Miles Davis album 'Jack Johnson' really did push the LP format to the limit - to this day I've never seen the end of a track closer to the very label itself. Both sides, each featuring just one track, are in excess of 25 minutes.

But, if it's songs only, then Caravan's 'In the Land of Grey and Pink' must be a contender - 22 minutes.