“Take a load off / Lay your burden down,” sings Graham Nash, his face tight with emotion but that storied voice still under perfect control. The lyrical reference to The Band’s The Weight is no accident, for this is Nash’s tribute, in song-form, to his friend, the Band drummer-singer Levon Helm who died in 2012. Unveiled exclusively here – and reprised as part of tonight’s instalment of UK subscription channel Sky Arts’ …Talks Music franchise – the song is called Back Home, and serves as the masterclass-style show’s moving keynote. The always chatty Nash, veteran of The Hollies, CSN(&Y) and solo success, is the perfect …Talks Music subject, with a life overflowing with great stories and classic songs. You can watch the full show – hosted by music TV mage Malcolm Gerrie – at 9pm tonight (Monday January 6) on Sky Arts 1 HD.