The Strategic Defence Review (SDR) was a British policy document produced in July 1998 by the Labour Government that had gained power a year previously.
Two of the largest defence procurement projects were excluded from the 1998 SDR, the Vanguard-class Trident submarines and the Eurofighter.
However the Trident system was essential to maintaining a credible nuclear deterrent, a policy adopted by Labour, and was already nearing completion.
Likewise the Eurofighter was nearing production and withdrawal would lead to loss of considerable investment and severe penalties from the partner nations.
This reviewed again the UK's defence posture and plans to ensure that the country possessed the right capabilities and the right forces to meet the additional challenges faced after 9/11.