JJ Cale tribute album 'The Breeze' trails 'X' at midweek point
Supermarket had begun playing exclusively new and unsigned artists in-store
Tracks played in stores described as 'diabolical' by angry employees
The royal was spotted on site over the weekend at the festival
The one-day event takes place this Saturday, August 2
Plus, new albums from Shabazz Palaces, Tom Petty and Soft Walls
The dance festival took place in Stratford-Upon-Avon this weekend
Kasey Anderson claimed to be working with Bruce Springsteen, Tom Petty and more on charity albums
New York trio are all aged between 12 and 13