Visit BBC 2 Scotland's website for sneak previews of the upcoming hour-long documentary Jack Bruce: The Man Behind the Bass, including a performance by Jack, with string quartet, of Theme for an Imaginary Western and a performance of Sunshine of Your Love with the virtuoso Scottish folk band Lau.   Tune in at 21:00 on 13 February for the broadcast.  The documentary will also be viewable on Sky 990 and 970 on Freesat, and will be available post-broadcast on BBC iPlayer throughout the UK.