Authorisation The Development, Concepts and Doctrine Centre (DCDC) is responsible for publishing strategic trends, joint concepts and doctrine. If you wish to quote our publications as reference material in other work, you should confirm with our editors whether the particular publication and amendment state remains authoritative. We welcome your comments on factual accuracy or amendment proposals. Please send them to: DCDC, Ministry of Defence Shrivenham, Swindon, Wiltshire, SN6 8RF E-mail: DCDC-DocEds@mod.gov.uk Telephone: 01793 31 4216/4217/4220 Copyright This publication is UK Ministry of Defence © Crown copyright (2018) including all images (unless otherwise stated). If contacting Defence Intellectual Property Rights for authority to release outside of the UK Government and MOD, the Patent Officer should be informed of any third party copyright within the publication. Crown copyright and Merchandise Licensing, Defence Intellectual Property rights, Central Legal Services, MOD Abbeywood South, Poplar 2 #2214, Bristol, BS34 8JH Email: DIPR-CC@mod.gov.uk Distribution Distributing Joint Doctrine Note (JDN) 1/18 is managed by the Forms and Publications Section, LCSLS Headquarters and Operations Centre, C16 Site, Ploughley Road, Arncott, Bicester, OX25 1LP. All of our other publications, including a regularly updated DCDC Publications Disk, can also be demanded from the LCSLS Operations Centre. LLCSLS Help Desk: 01869 256197 Military Network: 94240 2197 Our publications are available to view and download on the Defence Intranet (RLI) at: http://defenceintranet.diif.r.mil.uk/Organisations/Orgs/JFC/Organisations/Orgs/DCDC This publication is also available on the Internet at: www.gov.uk/mod/dcdc ii JDN 1/18