I get to the festival on the evening of Friday, so this thread was particularly helpful for me last year, and I wanted to start another.
I’ll note the obvious ones so far:
Friday:
Dua Lipa
IDLES
Jungle
Jamie XX
Fontaines D.C.
Saturday:
Coldplay
Disclosure
Jessie Ware
Justice
Gossip
Peggy Gou
Sunday:
SZA
Shania Twain
The National
James Blake
London Grammar