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The Report of the Iraq Inquiry
117.  Mr Cook subsequently told Secretary Powell that he had suggested to Mr Vedrine
that: “The aim should be to establish a common front between the Iraqi people and the
West against Saddam.”67
Review of the No-Fly Zones (NFZs)
118.  Section 1.1 addresses the legal basis advanced by the UK for the creation and
continued operation of the NFZs in northern and southern Iraq, and for the response to
Iraqi attacks on aircraft enforcing the NFZs.
119.  Operations in the NFZs and the targets which UK aircraft were permitted to attack
were regularly reviewed and approved by Ministers.
Response Options (ROs)
The coalition established NFZs in the north and south of Iraq in 1991 and 1992
respectively (see Section 1.1).
With the agreement of Ministers, operational commanders were allowed discretion to
respond in self-defence within the parameters of a number of graduated “Response
Options” (ROs) defined as:
RO1 – immediate self-defence. An aircraft in the air responding immediately to an
Iraqi threat to it, or to another coalition asset, although not necessarily against the
specific system directly causing the threat.
RO2 – a coalition response against a pre-planned target to a threat during the
course of a subsequent patrol on the same day.
RO3 – a coalition response against a pre-planned target on the next
patrolling day.68
ROs 1 to 3 were dependent on there being a “triggering threat” in the form of a weapon
fired or a radar illumination.
RO5 – pre-emptive self-defence on the basis of demonstrated Iraqi hostile intent,
such as a pre-emptive operation against mobile surface-to-air missile (SAM)
assets. RO5 was introduced to counter Iraqi tactics of threatening coalition aircraft
and then moving assets before coalition aircraft could respond.
Any proposal to carry out an attack that did not fall within the parameters defined within
ROs 1 to 3 and RO5 was classified RO4 and required Ministerial approval.
The agreed rules placed a limit on the number of targets that could be attacked in any
single response (six); and on the number of attacks that could be carried out within any
seven-day period (four).
From November 2000, the UK Commander was not authorised to commit to an RO attack
where civilian casualties were expected.69 By March 2001, UK forces no longer relied on
delegated authority in cases where the risk of collateral damage to civilian buildings was
considered higher than “low”.70
67  Telegram 69 FCO London to Washington, 12 February 2001, ‘Foreign Secretary’s Telephone
Conversation with Secretary Powell, 11 February’.
68  Email SEC(O)1-S to PS/Hd of MoDLA-S, 9 July 2001, ‘ROs’.
69  Letter Hemming to Brummell, 19 December 2001, ‘Iraq NFZs: Response Option Triggers’.
70  Letter Hemming to Berman, 6 March 2001, ‘Iraq – RO5 Target’.
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