On Thursday, we told you about a range of interviews that Gerald Scarfe was undertaking for the publication of his new book, "The Making of Pink Floyd - The Wall ". One of these interviews was on BBC Radio 4's "Today" programme yesterday morning, which included Gerald in the studio, and a pre-recorded telephone interview with Roger Waters from Montreal.

You can hear the programme again for the next seven days through this link. To hear an extended version of the interview with Roger Waters, where he talks about the importance of Gerald's artwork, the current Wall shows, and the upcoming guest appearance of David Gilmour in one of the shows, click here to listen or download (3MB file).