Story of A Heart, meanwhile, will feature on an album of the same name by The Benny Andersson Band.

BBC: Abba pair unveil new pop tracks

Several thousand fans cheered as Benny Andersson, Bjorn Ulvaeus, Anni-Frid Lyngstad and Agnetha Faltskog walked down the red carpet in Stockholm.

BBC: Abba quartet at Mamma Mia showing