United Kingdom of Great Britain and Northern Ireland
Practice Relating to Rule 1. The Principle of Distinction between Civilians and Combatants
Section A. The principle of distinction
The UK Military Manual (1958) refers to “the division of the population of a belligerent State into two classes, namely, the armed forces and the peaceful population”.
The UK LOAC Manual (2004) states:
Since military operations are to be conducted only against the enemy’s armed forces and military objectives, there must be a clear distinction between the armed forces and civilians, or between combatants and non-combatants, and between objects that might legitimately be attacked and those that are protected from attack. The principle of distinction, sometimes referred to as the principle of discrimination or identification, separates combatants from non-combatants and legitimate military targets from civilian objects.
In its chapter on air operations, the manual provides: “Parties to the conflict shall at all times distinguish between civilians or other protected persons and combatants and between civilian or exempt objects and military objectives.”
With regard to internal armed conflict, the manual states: “A distinction is to be drawn between those who are taking a direct part in hostilities, who may be attacked, and those who are not taking a direct part in hostilities, who are protected from attack.”
The UK LOAC Manual (2004), as amended in 2010, states:
Since military operations are to be conducted only against the enemy’s armed forces and military objectives, there must be a clear distinction between the armed forces and civilians, or between combatants and non-combatants, and between objects that might legitimately be attacked and those that are protected from attack.
In its written statement submitted to the ICJ in the Nuclear Weapons case
in 1995, the United Kingdom stated: “The parties to an armed conflict are required to discriminate between civilians and civilian objects on the one hand and combatants and military objectives on the other and to direct their attacks only against the latter.”
In 2003, in reply to a written question in the House of Commons, the UK Minister of State for the Armed Forces, Ministry of Defence, wrote: “Cluster bombs have been used against targets for which they were the most appropriate available weapon and where they could be used in accordance with international law, including with the principles of proportionality and discrimination.”
In 2003, in reply to a written question in the House of Commons asking whether he would “make it his policy not to use cluster bombs in urban or populated areas in Iraq”, the UK Secretary of State for Defence wrote:
Cluster bombs are only used strictly in accordance with international law. This includes the principles of distinction and proportionality as well as precautionary measures to be taken in planning and conducting an attack, as contained in the First Additional Protocol of 1977 to the Geneva Conventions of 1949. The targeting process takes account of these principles in matching the type of weapon used to the target to be attacked. There will be circumstances when it would be considered more appropriate to use other munitions than cluster bombs. These circumstances are more likely to arise in urban or populated areas as cluster bombs engage targets that cover an area.
The UK Government Strategy on the Protection of Civilians in Armed Conflict (2010) states: “IHL requires parties to a conflict to respect and protect civilians. In the conduct of military operations they must distinguish at all times between combatants and civilians”.