The Guardian has an obituary by the novelist Patrick Gale.
A notable working relationship at HarperCollins was with Fay Weldon, whose books she nurtured for 15 years. "Patricia edited without you really noticing," Weldon claimed. "She was a very light-handed editor, very subtle in how she made you change things or see things you might be doing wrong. And she was so widely read that she gave you the flattering feeling you were in the company of good writers."