Defence and Security

The secure communications and technology you need to respond to today’s challenging defence requirements.

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Assured capabilities, simplified

We have played a key part in helping maintain the national security of the UK for over 100 years. We are a trusted partner to the UK Government and one of the principle-founding members of the UK Cyber Security task force.

We focus on meeting the complex secure IT requirements of our customers who include the MOD and the security community, the United States government and the providers and suppliers of the air traffic control and aerospace community.

Our priority is keeping your data and communications secure. It inspires our innovation. Yet we never lose sight of the fact you want to be a cost-effective, forward looking, flexible organisation.

Our solutions for the defence, security and aerospace industries range from secure voice and data networks with fully managed services to training, cyber defence and airfreight logistics. They give you the latest technology – remote working, smartphones, efficiency, quick decision making and taking advantage of the web – without the security fears of public networks.

Governments, armed forces and aerospace companies – as well as private organisations like banks – have trusted us with their very specific needs for over 100 years.  They rely on us to keep them connected securely.

Our expertise and experience  gives you the confidence that your systems and data will be secure, whatever their classification, anywhere you need them.

BT Delivery PSN


Spotlight on Defence and Security

BT and the Public Services Network

Watch an overview of how BT is working with the PSN to help deliver compliant and flexible solutions.

  • BT Delivery PSN 04:31
  • BT and the Public Services Network
BT unquestionably has a pivotal role in the communications security sphere. However, the expertise and experience of its people is equally valuable in helping us apply technology for business advantage.”
- Commander Colin MacKay, OBE, Royal Navy (retd)

BT has, over the years, developed an in-depth understanding of the specific challenges we face. Their BT Connect portfolio is particularly well designed to support our communications needs.”
-Georges D’hollander General Manager NATO Consultation, Command and Control Agency



White papers

Tinker, tailor, soldier ... cyber-defender >

PDF - 2 MB

Today’s Sophisticated IT Threats Require Organised Defences.


3 PSN >

PDF - 589 KB

White paper

Cyber security >

PDF - 335 KB