According to Deagol's website (info from A Descriptive Bibliography, p. 386), the magazine Show Vol.1 No.1. January 1970 includes excerpts from an interview with Tolkien (in Philip Norman's article "Lord of the Flicks").

Trying to find a copy for sale of this publication, I discovered this listing on Being cautious I asked a seller if Norman's article was included but got a negative answer. Am I just looking at a similarly entitled magazine?