Jun 1–2 · The Brewery, Barbican EC1Y
AI / agentic
4 tracks: context engineering, agent orchestration, org enablement, agent security. Senior engineers + platform leads running AI agents in production. Speakers: Ryan Lopopolo (OpenAI), Dana Lawson (Netlify CTO), Dave Farley.
Code R30 → 30% off
Jun 2–4 · ExCeL London
Security
Europe's leading cyber event. 13,000+ professionals, 380+ exhibitors, 250 speakers. 2026 themes: agentic AI in security, post-quantum cryptography, ransomware economics. SANS workshops available (£75–125 extra).
£49+VAT full pass
Jun 2–3 · InterContinental O2, North Greenwich
Engineering leadership
LeadDev + StaffPlus + LeadingEng merged into one festival. 2,500+ attendees, 3 main stages, Director+ track, workshops. Riverside venue near O2 Arena. Jubilee line: North Greenwich.
see site
Jun 5 · The Brewery, 52 Chiswell St EC1Y
Salesforce
Europe's largest community-led Salesforce event, 11th edition. Multi-track: dev, admin, architecture, marketing, career. Community-run; full day including meals. Same venue as AI Native DevCon.
Community-priced
Jun 5–7 · Convene Sancroft, St. Paul's
Data / Python
Annual Python data science gathering organised by NumFOCUS. Tutorials on Friday, talks Sat–Sun. Central line: St. Paul's.
see site
Jun 8–12 · Olympia London (Expo: Jun 8–10)
Broad / festival
Europe's largest tech festival. 8,000+ companies, 2,000+ senior decision-makers. Theme: "Shaping the Future of Business." Partners: Microsoft, AWS, Deloitte, Accenture. Speakers: Aravind Srinivas (Perplexity), Ivan Zhao (Notion).
Various passes
Jun 23–24 · Kensington Conference & Events Centre W8
AI / enterprise
100+ speakers from Anthropic, Microsoft, IBM. Tracks: autonomous systems, neural networks, enterprise AI. VIP (£1,550) includes Speakers' Lounge + Congress Gala Dinner.
from £495 · VIP £1,550
Sep 22–24 · ExCeL London
Security / enterprise
CISOs and risk officers. Gartner analyst briefings, vendor-neutral research sessions. ExCeL Royal Docks campus. Part of the autumn Gartner trio.
Gartner pricing (≈£3k–4.5k)
Nov 16–17 · London
Cloud / enterprise
Infrastructure leads and cloud ops. Analyst-led sessions on infra strategy, ops, cloud. Closes the autumn Gartner trilogy (Security Sep → Apps → IT Infra Nov).
Gartner pricing (≈£3k–4.5k)