The London Ambulance Service declared a “business continuity incident” on Monday evening ahead of walkouts later this week, warning that the sickest and most severely injured patients would be prioritised as the service faces extraordinary demand. The service warned that its 999 and 111 services remained “extremely busy” and urged people to only call 999 for serious medical emegencies. “As part of our escalation plans, we’ve declared a Business Continuity Incident to help us manage the situation.