TPBFK coordinator Marilyn Mason was selected to appear on the Fourth Plinth in Trafalgar Square for an hour from 3.00 - 4.00 am on 18 September 2009, as part of Antony Gormley’s epic project “One & Other”. She chose to dress and act as a "plastic bag Vermeer", sitting silently on the plinth reading a book entitled “The Occasional Plastic Bag Has Its Uses – But Do We Each Really Need 300 A Year?”