Related Rule
United Kingdom of Great Britain and Northern Ireland
Practice Relating to Rule 100. Fair Trial Guarantees
Section F. Trial without undue delay
The UK Military Manual (1958) provides: “The investigation of charges against a prisoner of war shall be carried out as quickly as circumstances permit and in such manner that his trial will take place as quickly as possible.” 
United Kingdom, The Law of War on Land being Part III of the Manual of Military Law, The War Office, HMSO, 1958, § 230.
The manual further states that in occupied territories, the accused “must be brought to trial as rapidly as possible”. 
United Kingdom, The Law of War on Land being Part III of the Manual of Military Law, The War Office, HMSO, 1958, § 570.
The UK LOAC Manual (2004) states in its discussion on judicial proceedings against prisoners of war: “Investigation of charges must be carried out as rapidly as circumstances permit so that the trial can take place as soon as possible.” 
United Kingdom, The Manual of the Law of Armed Conflict, Ministry of Defence, 1 July 2004, § 8.133.
In its discussion on the administration of criminal law in occupied territory, the manual further states: “The accused shall be brought to trial as rapidly as possible.” 
United Kingdom, The Manual of the Law of Armed Conflict, Ministry of Defence, 1 July 2004, § 11.64 11 .
In 2006, in its sixth periodic report to the Human Rights Committee, the United Kingdom stated:
Article 14
Delay in criminal proceedings
524. The Government is committed to reducing unnecessary delay in the criminal justice system. It is rarely in the interests of justice that a case becomes protracted. Measures introduced since 1997 have played an integral part in seeking to reduce delay wherever possible, but the Government fully recognizes the need to do more. Critically, the Government is trying to ensure that the needs of victims and witnesses are considered at all stages of the process. 
United Kingdom, Sixth periodic report to the Human Rights Committee, UN Doc. CCPR/C/GBR/6, 18 May 2007, submitted 1 November 2006, § 524.