When systems fail, command decides the outcome.
CYBERUK 2026 — Glasgow, 21–23 April. Mattermost is running a live test of incident coordination for senior security leaders. Unscheduled time at CYBERUK fills fast. The conversations worth having start before you arrive.

CYBERUK runs for three days. The time that matters is booked in advance.
Unscheduled conversations at CYBERUK are brief, interrupted, and rarely reach the substance that matters. Pre-booked meetings have an agenda, the right people, and 30 minutes of protected time.
The tabletop exercise on Thursday 23 April has limited capacity. Seats go to those who arrive early. Book time with us before the event and we will walk you through what to expect.
CYBERUK attracts 3,000+ senior security leaders. The organisations you want to benchmark against will be in the room. The conversation you need to have will not happen by accident.
The Resilience Bill is changing the accountability question.
The UK Cyber Security and Resilience Bill, expected to receive Royal Assent in 2026, requires organisations to demonstrate coordinated command throughout an incident — not just recovery after it. That means audit trails, decision lineage, and evidence of control from the moment an incident is declared. The organisations that will meet that bar are the ones already testing their command structure under pressure.
“In those first 60 minutes, leadership is still debating which messaging group to use, or which document to go to for the incident plan. The structure has to exist before the incident — not during it.”
— James Mullins, VP EMEA & APAC Sales, Mattermost