'Screamadelica Live!' is out on May 31
Band will get ready for summer in Leamington Spa and Cardiff
Band to join Gaslight Anthem and Ocean Colour Scene at event
Mark Ronson and Blondie also on the bill for Dorset festival
14 new acts in total are added to the bash
Plus Horrors set for June 23 show at Eden Project
Primal Scream man describes drug's influence
Band expanding March UK tour
Bobby Gillespie and co play first of seminal album shows