England is the birthplace of progressive rock, where classical training and being well-read need not be a handicap when clanging out some chords. Imogen Heap turns obsessions into satin layers of her own voice. She's a control freak. More people helped with the liner art than with the music. The similarity to Kate Bush is no greater than to early Genesis or XTC, and is more a degree of difference from what surrounds her. She's peculiar yet posh. "Earth" relates to the environment and also to love. When she bellows "Stop this right away," Heap is probably right, whatever it is.