Can Abba really recreate the feel of a live concert using holograms 41 years after their last set?

This week the supergroup begin seven months of gigs in a purpose-built London arena... with the band members elsewhere

Just over 41 years ago, Abba played their last concert together. It wasn't a live show for salivating fans, but a short set for Swedish TV. A highlight was their recent hit Super Trouper, a song about the sad, endless grind of being on tour.

All I do is eat and sleep and sing / Wishing every show was the last show," sang Agnetha Faltskog and Anni-Frid Lyngstad, their voices still gorgeous together. The lyrics go on: Facing 20,000 of your friends, how can anyone be so lonely?"