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NEW DATES! NEW 3-DAY FORMAT! We look forward to welcoming you on 18, 19, & 20 November 2024!

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The UK’s most diverse and forward-thinking security expo

SDSC troops with Chinook in desert

Welcome to Specialist Defence & Security Convention UK (SDSC-UK), formerly the Three Counties Defence and Security Expo (3CDSE),  the UK’s most diverse and forward-thinking defence and security expo. 

SDSC-UK is an active touchpoint for leading-edge technology and strategic thinking, bringing together the UK's leading innovators to create a forum for mutually beneficial commercial discussions between industry, armed forces, government, law enforcement and emergency services. 

SDSC-UK is proud to work closely with MOD,
in particular Defence Equipment & Support and 
Strategic Command.

It engages both UK and foreign intelligence,
Government and Law enforcement agencies

Why Visit

SDSC-UK is a unique showcase for this hub of innovation to share new ideas and host those involved in the industry nationally and internationally on their “home turf”. The show brings together senior military leading forces development and procurement, senior police engaged in the fight against cyber-crime, the intelligence and security agencies, and the industry innovators who supply them, to identify future strategies and needs.

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SDSC-UK always has its targets set on the new threat landscape – how air, sea, land, cyber and space capabilities are evolving to become fit for purpose today and prepared for the new challenges and capability requirements of tomorrow.

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Event & Media Partners

We wish to thank our sponsors, media and event partners for their support and contribution to the tremendous success of 3CDSE 2022 and we look forward to welcoming new and returning sponsors and partners at SDSC-UK in 2023. We welcome you and thank you.

1600+ in 2022

1600+ decision-makers from the Military, Law enforcement, Government, Private sector, Security Agencies and Emergency services and 120+ exhibitors attended in 2022.

Look back at 2023












Media Partner




PR & Communications Partner


Event Partners


Please note: SDSC-UK and its trading company 3CDS (Trading) Ltd do not sell or pass on any SDSC-UK contact details to third parties other than those that are expressly authorised to have access to that data for the proper functioning of their roles.

We work with Cyber Quarter, the Midlands Centre for Cyber Security/Univ of Wolverhampton, to ensure that our systems are safe, secure and robust. We are pleased to be rated in the top 10% of organisations for cyber security in the Aerospace and Defence & Security Industry. 

On occasion we are made aware of unscrupulous external actors who claim to hold data from exhibitions such as SDSC-UK. Please be advised that any person offering such data and purporting to be acting on behalf SDSC-UK is fraudulent. Any such perpetrators will be pursued by our sister company, Harrison Clark Rickerbys (hcr), a Top 100 law firm.

Our Security and IT experts advise that it is best not to respond to such emails as by doing so, you may be unwittingly verifying your own email address. If you have any concerns in this regard, please contact Anna Roby-Welford, Director, SDSC-UK