Claim: New Writings in SF 15 is an anthology of science fiction short stories that includes an entry from Christopher Priest.
Evidence: New Writings in SF 15 is an anthology of science fiction short stories edited by John Carnell, the fifteenth volume in a series of thirty, of which he edited the first twenty-one. "The Interrogator" (Christopher Priest) 
The book collects six novelettes and short stories by various science fiction authors, with a foreword by Carnell. "The Interrogator" (Christopher Priest)