TL;DR June is London’s peak tech month: Infosecurity Europe (free, 2–4 Jun at ExCeL), London Tech Week (8–12 Jun, Olympia), and AI World Congress (23–24 Jun, £495) all overlap. For free access at any time of year, also look at Tech Show London (March, ExCeL) and AWS Summit London (April, ExCeL). Developer-focused premium conferences — QCon, Devoxx UK, DevOpsCon — cluster March–May at £650–£2,700. Autumn brings three Gartner summits at ExCeL covering security, apps, and infrastructure.
2026 Calendar
✓ = already held; → = upcoming from 2 June 2026.
| Date | Event | Focus | Venue | Cost (excl. VAT) |
|---|---|---|---|---|
| 26–30 Jan ✓ | NDC London | Software development | QEII Centre, Westminster | £850–£2,490 |
| 11–12 Feb ✓ | ContainerDays + MCPconference | Cloud Native, MCP/AI | The Truman Brewery, Brick Lane | see site |
| 4–5 Mar ✓ | Tech Show London | AI, cloud, cyber, DevOps | ExCeL London | Free (tech end-users) |
| 16–19 Mar ✓ | QCon London | Software architecture | QEII Centre, Westminster | £2,690 (3-day in-person) |
| 22 Apr ✓ | AWS Summit London | Cloud, AI, infrastructure | ExCeL London | Free |
| 6–7 May ✓ | Devoxx UK | Java, cloud, AI, security | Business Design Centre, N1 | £649 (2-day) |
| 11–15 May ✓ | DevOpsCon London | DevOps, Kubernetes, GenAI | Park Plaza Victoria + QEII Centre | £989–£1,979 |
| 11–13 May ✓ | Gartner Data & Analytics | Enterprise data/AI | London | Gartner pricing |
| 1–2 Jun → | AI Native DevCon | Agentic AI, agent security | The Brewery, Barbican, EC1Y | 30% off code: R30 |
| 2–4 Jun → | Infosecurity Europe | Cybersecurity | ExCeL London | £49+VAT |
| 2–3 Jun → | LDX3 London (LeadDev) | Engineering leadership | InterContinental London O2 | see site |
| 5 Jun → | London’s Calling | Salesforce ecosystem | The Brewery, 52 Chiswell St, EC1Y | Community-priced |
| 5–7 Jun → | PyData London | Python, data science, ML | Convene Sancroft, St. Paul’s | see site |
| 8–12 Jun → | London Tech Week | Broad tech festival | Olympia London (Expo: 8–10 Jun) | Various passes |
| 23–24 Jun → | AI World Congress | AI, robotics, automation | Kensington Conference Centre, W8 | £495 |
| 22–24 Sep → | Gartner Security & Risk Mgmt | Enterprise security | ExCeL London | Gartner pricing |
| 16–17 Nov → | Gartner IT Infra & Cloud | Infra, ops, cloud strategy | London | Gartner pricing |
Now Happening: 2–7 June 2026
Infosecurity Europe (2–4 Jun, ExCeL London) — Europe’s leading cybersecurity event [2]: 13,000+ professionals, 380+ exhibitors, 250 speakers. 2026 themes: agentic AI in security, post-quantum cryptography, ransomware economics. Standard passes are £49+VAT (were free before 5 May). SANS Institute technical workshops cost extra (£75–£125+VAT). Nearest station: Custom House (Elizabeth line / DLR).
AI Native DevCon (1–2 Jun, The Brewery, Barbican) — Two-day in-person conference for senior engineers and platform leads running AI agents in production [3]. Four tracks: context engineering, agent orchestration, org enablement, agent security. Speakers include Ryan Lopopolo (OpenAI), Dana Lawson (Netlify CTO), Dave Farley. Discount code R30 cuts 30% off registration.
LDX3 London (2–3 Jun, InterContinental O2) — LeadDev, StaffPlus, and LeadingEng merged into one festival for engineering leadership [17]. 2,500+ attendees, three main stages, Director+ track, workshops. Riverside venue near the O2 Arena (North Greenwich tube, Jubilee line).
London’s Calling (5 Jun, The Brewery, EC1Y 4SA) — Europe’s largest community-led Salesforce event, 11th edition [5]. Multi-track across dev, admin, architecture, marketing, and career growth. Community-run; full day including meals.
PyData London (5–7 Jun, Convene Sancroft, St. Paul’s) — Annual gathering for Python data practitioners [4]. Tutorials Friday, talks Saturday–Sunday. Organised by NumFOCUS. Nearest tube: St. Paul’s (Central line).
London Tech Week (8–12 June)
London Tech Week is Europe’s largest tech festival [1], drawing 8,000+ companies and 2,000+ senior decision-makers to Olympia London. The Expo and Content Stages run 8–10 June; Fringe Events (meetups, side conferences, roundtables) extend across the city through 12 June. 2026 theme: “Shaping the Future of Business Through Technology.” Headline partners: Microsoft, AWS, Deloitte, Accenture, Salesforce. Notable speakers: Aravind Srinivas (Perplexity CEO), Ivan Zhao (Notion Co-Founder), Liz Kendall (UK Secretary of State for Science). Multiple pass tiers; details and pricing at the official site.
Late June: AI World Congress (23–24 June)
AI World Congress 2026 at Kensington Conference and Events Centre [16] bills itself as Europe’s premier AI summit for senior decision-makers. 100+ speakers drawn from Anthropic, Microsoft, IBM, and leading research institutions; tracks on autonomous systems, neural networks, and enterprise AI deployment. Tickets from £495; VIP packages (£1,550) include Speakers’ Lounge access and a Congress Gala Dinner.
Autumn Gartner Trilogy
Three consecutive Gartner analyst summits at ExCeL London anchor the autumn calendar:
| Date | Summit | Audience |
|---|---|---|
| 22–24 Sep → | Security & Risk Management | CISOs, risk officers |
| Sep → | Application Innovation & Biz Solutions | App leaders, enterprise architects |
| 16–17 Nov → | IT Infra, Operations & Cloud | Infrastructure leads, cloud ops |
All Gartner events use analyst-briefing pricing (typically £3,000–£4,500 for two days); contact Gartner directly for quotes.
By Role & Budget
| If you are… | Go to |
|---|---|
| Security professional | Infosecurity Europe (free) or Gartner Security (Sep) |
| Software / platform engineer | QCon London, Devoxx UK, NDC London (£650–£2,700) |
| AI / ML practitioner | AI Native DevCon, PyData London, AI World Congress |
| DevOps / cloud engineer | DevOpsCon, Tech Show London (free), AWS Summit (free) |
| Engineering manager / director | LDX3 London (LeadDev + StaffPlus) |
| Salesforce ecosystem | London’s Calling (community-priced, June) |
| Enterprise / CTO / CIO | London Tech Week, Gartner summits, AI World Congress |
Practical Notes
- ExCeL London (Custom House, Elizabeth line / DLR) hosts Tech Show London, AWS Summit, Infosecurity Europe, and the two autumn Gartner summits — all in the same Royal Docks campus.
- QEII Centre, Westminster (St. James’s Park tube) is London’s other major conference hub, used by QCon and NDC London.
- The Brewery (Barbican, EC1Y) co-hosts AI Native DevCon (June 1–2) and London’s Calling (June 5) in the same week.
- UK Electronic Travel Authorization (ETA) required for most nationalities since January 2025; check eligibility before booking.