SummaryIT outages are reported across the world, affecting airlines, media, and banksAirlines and airports have reported issues, with many flights grounded The cause is not known - but Microsoft says it's taking mitigation actionIn the UK, railway companies say they're experiencing "widespread IT issues"Sky News has not been able to broadcast live, its executive chairman saysThe London Stock Exchange is also experiencing outagesLive ReportingEdited by Owen Amos and Barbara TaschUS airlines issue...