X-rated Bob wrote
Fleetwood Mac - Boston Blues
Not the same live disc that Singemonkey has been recommending, but compiled from the same live recordings made in 1970.
It is fab. This is a seriously great band in magical live form. It reminds me that I once loved the blues and why.
Great performances, and the guitarists.... these guys can blow for 10, 15 minutes and it never gets boring. The band's sense and control of dynamics is so good, the guitarists are skilled and resourceful.
Money very well spent.
Give the Fleetwood Mac Live 1980 album a listen to... a great double album 8)