Following the split of DERA in 2001 into QinetiQ and Dstl, the Fort Halstead site was retained by QinetiQ who leased part of the site back to Dstl. Its most recent principal functions have been research, test, evaluation and forensic analysis into explosives, and the site's explosives laboratory was again used in the investigation following the attempted 21 July 2005 London bombings. The facility has been the largest employer in the Sevenoaks district, with 1,300 personnel working on the site in 2000.