A fire at Heathrow Airport is reported to have led to the closure of one or more runways and widespread travel delays. Both outlets describe smoke rising from an area of grass near the airport, disrupting normal flight operations. The Independent reports that smoke is visible rising from the grass, with flights delayed as a result. The Evening Standard similarly says a grassfire closes the runway, citing social media footage that appears to show smoke over the runway. While specific details such as the exact location of the fire and the number of flights affected are not provided in the supplied excerpts, the common elements across both reports are the presence of smoke from grass, the decision to close the runway, and subsequent delays for air passengers and airlines. The situation is treated as an operational disruption driven by the fire and resulting safety measures, rather than as a separate incident affecting aircraft in flight, based on the information available in the two summaries.