British Airways faced significant flight disruptions due to a technical issue affecting computer systems, leaving passengers stranded at various airports. Delays began around 17:00 on Monday, causing frustration among travelers. The airline has since resolved the issue and apologized to customers, assuring that no flights were canceled. Travel expert Simon Calder estimated that tens of thousands might have been impacted, albeit with delays typically lasting one to two hours. Concerns remained about potential knock-on effects for flights the following day.