A really interesting interview with Benny and Björn by Jan Gradvall that was posted on ABBA's YouTube page.

They cover every aspect of the ABBA Voyage show.

A mysterious video also appeared around the same time on AtlantisMetronome's social media page, showing Benny playing Dancing Queen on the piano at Metronome (now Atlantis) with Björn standing by the side of him wearing an overcoat.  It's now become clear that this was the day that they recorded The Q&A interview.  During that interview it was mentioned that it was the same piano in the studio that had been used for the Dancing Queen recording - so possibly Benny was just reliving the moment while there!

YouTube link c/o ABBA