Big Data LDN 2026

Big Data LDN is the UK's leading free to attend event for data, analytics, and AI professionals. It runs for two days at Olympia London with more than 300 speakers, 200 exhibitors, and 400 sessions spread across 15 to 16 theatres. The audience ranges from data engineers and architects to chief data officers, and the 2026 edition adds a new track on AI agents, AI governance, and data products. It sits alongside Reed Exhibitions' wider Data, IT and Tech portfolio, so the crowd is practical and vendor heavy rather than purely academic.