Recent polls suggest a growing majority of people in Scotland now favour independence, so what’s behind the change since the 2014 referendum when 55% of voters chose to remain in the Union? How likely is another vote considering Boris Johnson has said it’s not going to happen and what issues are likely to dominate campaigning if it does?

David Aaronovitch asks the experts:

Allan Little reported widely on devolution and the questions around Scottish independence as a BBC special correspondent.

Producers: Kirtseen Knight, Beth Sagar-Fenton and Joe Kent