The last missiles left the base in 1991 as a result of the Intermediate-Range Nuclear Forces Treaty, but the camp remained in place until 2000, after protesters won the right to house a memorial on the site. Although the missiles had been removed from the base, the camp was continued as part of the protest against the forthcoming UK Trident programme. Sarah Hipperson, who had been a part of the protest for all nineteen of its years, was among the last four women to leave the camp.