Règle correspondante
United Kingdom of Great Britain and Northern Ireland
Practice Relating to Rule 161. International Cooperation in Criminal Proceedings
Section A. Cooperation between States
The UK LOAC Manual (2004) states:
Ensuring respect for the law of armed conflict is a universal responsibility. International co-operation is encouraged by Additional Protocol I, which provides for:
c. mutual assistance in criminal proceedings brought in respect of grave breaches of the conventions or protocol, including assistance with evidence and extradition. 
United Kingdom, The Manual of the Law of Armed Conflict, Ministry of Defence, 1 July 2004, § 16.9(c).
In 2003, in its fourth periodic report to the Committee against Torture, the United Kingdom stated:
As described in previous reports, the United Kingdom gives full legal assistance under the Criminal Justice (International Co-operation) Act 1990 to foreign courts or prosecuting authorities. The United Kingdom Central Authority for mutual legal assistance has not, to its knowledge, received any requests for assistance from overseas authorities in connection with offences involving torture. 
United Kingdom, Fourth periodic report to the Committee against Torture, UN Doc. CAT/C/67/Add.2, 27 May 2004, submitted 6 November 2003, § 68.