Peter Sellers: Goon Show character voices (Parkinson interview 1974)

In this extract from the interview he gave to Michael Parkinson in 1974, actor and comedian Peter Sellers talks about the origins of the voices for the characters used in the BBC Radio series The Goon Show.
An extract from Parkinson, originally broadcast on BBC1 on 9th November 1974, which was repeated in an edited form on 9th August 1996 as a programme in the series Parkinson: The Interviews.