Tom Dunne: I'm in mourning for the end of the era of the band 

Richard Osman has the evidence about how the music world has  changed 

Damon Albarnb and Graham Coxon of Blur in 1997. Is the reign of such bands finished? (AP Photo/Chris Pizzello)

“You don’t know what you’ve got til its gone” as Joni Mitchell once sang, and in the case of bands it couldn’t be more true.

The era of the band – as in a small group of musicians who play music - is over.