Kraftwerk's first academic conference lacks crucial guest

The world's first academic conference on the German group Kraftwerk is currently taking place at Aston University, Birmingham.

David Bowie and Depeche Mode have previously cited them as a major influence, while Andy McCluskey from OMD has gone further, insisting that Kraftwerk are the most important band in the history of music.

BBC Breakfast's entertainment correspondent Colin Paterson went along to day one, but discovered one crucial speaker had not shown up.