The situation is improving, with British Airways, Heathrow's largest airline, forecasting that around 85% of Saturday’s scheduled flights will proceed, albeit with delays expected throughout the day. Travelers are advised to check with their airlines before heading to the airport to avoid unnecessary travel, as substantial delays remain likely while airlines work to realign their schedules.

Heathrow's chief executive, Thomas Woldbye, noted that while a backup transformer functioned during the outage, it wasn't sufficient to support the entire airport's power needs. The London Fire Brigade reported challenges in extinguishing the fire due to the presence of cooling oil at the substation, complicating recovery efforts. Following the incident, the National Grid has made adjustments to partially restore power to the airport and surrounding areas.

As international flights begin to arrive from various destinations, including Hong Kong, South Africa, and Brazil, the airport continues to advise passengers of the ongoing challenges and to remain patient during this recovery phase.