<h1>Airport suspension halts Heathrow operations, causing widespread flight cancellations, diversions and major passenger disruption with advisories issued.</h1> Temporary suspension of operations at London Heathrow due to a significant power outage caused widespread international flight disruption: Air India returned one flight, diverted another and cancelled remaining Heathrow services for the day while Gatwick flights remained unaffected; analytics projected substantial passenger exposure based on scheduled seats, and carriers advised passengers not to travel to the airport while arranging alternative travel options.