A significant global IT outage has caused disruptions across various sectors, with UK airports being the most affected.
- The incident originated from a cybersecurity issue at CrowdStrike, impacting transport operators globally.
- Airports swiftly enacted contingency plans to minimise passenger disruption.
- Rail services faced minor delays, while motorway systems remained mostly unaffected.
- Energy networks reported no significant impacts, but the situation is under close watch.
On 19 July, a substantial global IT outage severely disrupted various infrastructure sectors, with UK airports being particularly affected. The incident originated from a cybersecurity issue at US-based firm CrowdStrike, initially misattributed to Microsoft. This disruption extended its reach to banks, health services, transport networks, and more, causing widespread operational challenges.
The Secretary of State for Transport, Louise Haigh, confirmed the impact on transport operators and terminals in the UK. She advised travellers to follow operator guidance, as manual check-ins might be necessary at airports, leading to potential flight cancellations and delays.
Airports across the UK, while worst affected, managed to quickly implement contingency plans. A spokesperson for Airports UK stated that despite the IT issues, efforts were successfully made to keep passenger disruption minimal, allowing most travellers to continue their journeys as planned. Authorities remain engaged with airlines and passengers to address ongoing challenges.
In contrast, the railway sector experienced lesser impacts. A Network Rail spokesperson indicated that essential train control and communication systems were functioning normally. However, some passenger information and crew roster systems experienced issues, leading to last-minute delays and cancellations. Travellers were advised to check updates from individual train operators.
Motorway systems, including smart motorway technology, reported minimal disruption. National Highways noted some problems with the Dart Charge service for the Dartford Crossing, but these were swiftly resolved. Other operational technologies remained unaffected.
The energy sector, vigilant in monitoring the evolving situation, reported no critical system impacts. Organisations such as National Grid, SSE, and EDF confirmed their ongoing operations were unimpeded by the IT incident. However, they continue to closely observe developments to ensure continued service reliability.
CrowdStrike, at the centre of this outage, clarified that the issue arose from a defect in a Windows update, affecting only Windows hosts, while Mac and Linux systems remained unaffected. The company took decisive action to isolate the problem, deploying a fix and maintaining continuous communication with affected clients.
The resolution process involved a concerted effort across affected sectors to restore normal operations and communicate effectively with stakeholders. CrowdStrike’s transparency and proactive approach in addressing the issue were crucial in managing the crisis.
The swift response of various sectors to this IT outage underscores the resilience and adaptability of UK infrastructure.
