New Delhi, June 6 -- The invitation arrived, characteristically, without fanfare. A post on her social media channels. A date: July 5. A city: London. A promise of new songs. For a singer who vanished from public life at one of the most discussed moments in British pop music, Duffy's announcement of a secret intimate gig landed this week with the quiet force of a long-deferred reckoning.

"I'm doing a secret intimate gig in London on July 5, next month, and I would love nothing more than for some of you to attend. Please visit the link below and leave your details if you want to come. It's only small capacity so we can only select a few, but really looking forward to it. I will sing some new songs. All my love, Duffy x."

Fans will not be...