What has Peter Warlock and Michael Heseltine got in common?

Peter Warlock's real name was Philip Michael Heseltine. He wrote as a music critic under the name Heseltine, but composed under the name Warlock. You may find some sites that get this the other way around, just to confuse matters. He was born in 1894 and probably committed suicide in 1930, although there some who think it was an accidental death. I can find no connection with the Tory politician Michael Heseltine.