Today's fifth Christmas guest editor is Björn Ulvaeus from ABBA.

Hear highlights from his programme, which looks at the impact of Artificial Intelligence and technology on music, the future of democracy and of course Eurovision - the contest which launched Abba's global success nearly 50 years ago.

Guests include Dave Stewart from the Eurythmics, the historian Noah Yuval Harari, Andy Bell from Erasure, the boss of Eurovision, as well as its UK presenter Rylan Clark, and former culture minister Lord Vaizey.