The Strath Committee, chaired by Sir William Strath, was set up by the British Ministry of Defence to consider the short- and long-term effects of a hydrogen bomb attack on the United Kingdom. The committee began its work in November 1954, and submitted a preliminary report to Defence Minister Harold Macmillan a month later. The final report was issued in March 1955; while it was officially known as "The Defence Implications of Fall-Out from a Hydrogen Bomb: Report by a Group of Officials", the report is normally cited as the Strath Report instead.