Big Big Train, Curved Air and Pure Reason Revolution have all been confirmed for next year's event.
'Zappa In New York' was a record of how the maestro spent Christmas 1976.
Two original forces in progressive music share the A New Day Festival bill and then a November 2018 London show.
Darryl Way, co-founder of prog rock pacesetters Curved Air, has released Myths, Legends And Tales, on which he reworks Vivaldi's violin concerti.
Acclaimed British prog rockers Alan Parsons Project's debut album Tales Of Mystery And Imagination is being reissued on black vinyl through UMG