30 Apr 1988 The Purple Helmets in Stockwell Down in the Sewer Posted on April 30, 1988 by Rattus RattusApril 19, 2012 Artist: The Purple Helmets Date: 30 Apr 1988 Venue: The Swan City: Stockwell Address: 215 Clapham Rd London SW9 9BE Country: United Kingdom Notes: Cancelled