Earth, Pallbearer, Conan, Elephant Tree, Chöd, Hippie Death Cult, Castle Rat, Avon, Green Milk From The Planet Orange, Servo, Mr Bison, Kind, El Moono, The Hazytones, King Botfly, Lust Ritual, Slump, Witchorious, The Summit Fever, and Dresden Wolves have all been added to next year’s edition of Desertfest London. That event will be held in…