The castaway on Desert Island Discs this week is Dame Shirley Porter, who, as Lady Porter, was the flamboyant leader of the ruling Conservative Group at Westminster City Council - a post she held from 1983 until she stepped down in April 1991. She'll be telling Sue Lawley about what it was that made her go into politics at the age of 40, about her campaign for cleanliness on the streets of the capital and about her plans for the future.

[Taken from the original programme material for this archive edition of Desert Island Discs]

Favourite track: The Ode To Joy (Symphony No 9) by Ludwig van Beethoven