DSEI 2025

• DatesSeptember 9–12, 2025
• VenueExCeL London
• LocationLondon, United Kingdom
• CategoryDefense & Security
• Official websitedsei.co.uk

About DSEI 2025

DSEI 2025 is a defense and security industry event that took place September 9–12, 2025 at ExCeL London in London, United Kingdom. It ran for four days, from Tuesday to Friday.

Shows like this one typically draw government and military procurement officials, integrators, security directors, engineers and analysts. For registration, exhibitor packages and the floor plan, go to the official website, dsei.co.uk.

ShowFloorTips is an independent guide and is not affiliated with the organizer. Dates, venues and rules can change, so confirm the details with the organizer before you book.

What to expect at DSEI 2025

Defense and security events are formal and often restricted. Badge checks, export rules and confidentiality shape what can be shown and discussed, and many conversations are with long-term partners.

Over four days, traffic usually peaks on the first two days and thins out on the last one. The quieter final day is a good time for longer conversations, visiting other stands and meeting suppliers. At events like this, expect most visitors to be government and military procurement officials and their colleagues, often with a short list of suppliers they want to see.

How exhibitors should prepare for DSEI 2025

Most exhibitors start planning four months before a show: booth space and hotels first, then booth services and graphics about eight weeks out, freight and meetings four weeks out, and a final check of devices and staffing the week before.

Preparation tips for defense and security shows

• Check registration, security clearance and export control rules for products you plan to display.
• Prepare unclassified briefing material suitable for a general audience.
• Schedule meetings with integrators and procurement officials in advance.

Booth tips for DSEI 2025

• Keep displays professional and factual; claims are scrutinized.
• Know which information you may and may not share at a public stand.
• Collect only professional contact details, and respect visitors who prefer not to have their badge scanned.
• Walk the hall at ExCeL London during move-in to see which entrances and aisles carry the most traffic, and set up your booth so it faces that flow.
• Plan shifts of three to four hours. Standing and talking for four days wears people out, and tired staff let good leads walk past.
• Capture every conversation the moment it ends: scan the badge or card, add a one-line note about what the visitor needs, and rate the lead hot, warm or cold. Notes written that evening are already half forgotten.

For a full list of what to bring, use the free booth checklist, and plan the money side with the trade show ROI calculator.

Following up leads after DSEI 2025

Most of the value of a trade show is created after it closes. Procurement cycles are long and formal, so follow up through the proper channels with documentation.

1. Within 24 hours
   Send a short personal email to every hot lead, mentioning one detail from your conversation.
2. Within 3 days
   Send what you promised at the booth and log every lead in your CRM with its rating and notes.
3. After two weeks
   Make a second, useful touch: a case study, a short video or an answer to their question.
4. After a month
   Review results: meetings booked, cost per lead, and whether the show is worth repeating.

Ready-to-edit messages for each step are in our trade show follow-up email templates.

Getting to London

London has several airports: Heathrow (LHR), Gatwick (LGW) and London City (LCY), which is the closest to ExCeL London in the Docklands. The Elizabeth line stops at Custom House for ExCeL and links Heathrow with central London. Contactless bank cards work on the Tube, buses and trains. Many visitors now need an Electronic Travel Authorisation (ETA) before traveling to the UK, so check the rules for your passport.

Hotels closest to the venue sell out first during show week, and many organizers offer discounted room blocks that close weeks before the show, so book early. Our city travel guides cover hotels, transport and budgeting for the busiest show cities.

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