David Christopher Kelly was a Welsh scientist and authority on biological warfare (BW). A former head of the Defence Microbiology Division working at Porton Down, Kelly was part of a joint US-UK team that inspected civilian biotechnology facilities in Russia in the early 1990s and concluded they were running a covert and illegal BW programme. He was appointed to the United Nations Special Commission (UNSCOM) in 1991 as one of its chief weapons inspectors in Iraq and led ten of the organisation's missions between May 1991 and December 1998. He also worked with UNSCOM's successor, the United Nations Monitoring, Verification and Inspection Commission (UNMOVIC) and led several of their missions into Iraq. During his time with UNMOVIC he was key in uncovering the anthrax production programme at the Salman Pak facility, and a BW programme run at Al Hakum.

Porton Down is a science and defence technology campus in Wiltshire, England, just north-east of the village of Porton, near Salisbury. It is home to two British government facilities: a site of the Ministry of Defence's Defence Science and Technology Laboratory – known for over 100 years as one of the UK's most secretive and controversial military research facilities, occupying 7,000 acres (2,800 ha) – and a site of the UK Health Security Agency. Since 2018, part of the campus has housed Porton Science Park, which is owned and operated by Wiltshire Council and has private sector companies in the health, life science and defence and security sectors.