UK air travel disrupted: 2,000+ flights cancelled over 2 days due to technical issue

A technical issue has caused over 2,000 flight cancellations across the UK over two days, with Heathrow, the busiest airport, cancelling 120 arrivals and 67 departures. The nature of the technical fault remains unspecified, and the duration of the disruption is uncertain. This is a significant infrastructure failure affecting travel and potentially the economy.