The chorus about 50 seconds in on this clip (where she sings "We've gotta let go of all of our ghosts. We both know we ain't kids no more") is the bot on the Glastonbury trailer I saw
Yes, usually an Adele record can be recognised instantly but I've heard this a few times and keep thinking "who is that" until at one point fairly late in the song I recognise it as Adele
They are still using that one then. She does sound like Jess Glynn to me on this track. I think Adele will go down well as Saturday headliner..
I'm looking forward to seeing Lost Shadow Puppets, The Foals, ELO , Jake Bugg, Squeeze and Madness.