 In June 2012 Lambert was accused in Parliament by Caroline Lucas MP of planting the fire bomb that caused £340,000 worth of damage to the Harrow branch of a Debenhams department store in 1987 as part of his undercover work in the Animal Liberation Front.Lambert denied this.His activities as a police spy came to public attention in the course of revelations that the Metropolitan Police have employed undercover operatives (including Mark Kennedy), some of whom acted in ways designed to disrupt the activities of the groups they infiltrated.