Tickets are on sale this Friday
The festival debuted at Clifton Downs last year
Releases by Peking Duk, Ocean Alley, Polish Club, Underground Lovers, GUM and Ambrose Kenny-Smith – along with a new 'Bluey' soundtrack album – are among other local Record Store Day highlights
The LA sisters will be joined by the likes of Tove Lo and Confidence Man at the London event
Amyl And The Sniffers, The Walkmen, Young Fathers and Confidence Man are also on the bill
They will join the previously announced Christine and the Queens, The Chemical Brothers, Fatboy Slim, Sugababes and more
She joins previously confirmed headliners Liam Gallagher and Florence + The Machine
The July festival will be headlined by Pulp, Paolo Nutini and George Ezra
The Kooks, Rudimental and Sugababes are also booked to play the two-day event
Tickets go on sale next Tuesday