<p>Nats says fault at Prestwick has been ‘fixed’ after airports in Scotland, northern England and Northern Ireland are hit</p><p><a href="https://www.theguardian.com/business/live/2026/sep/21/asian-shares-rise-optimism-us-chinese-talks-trade-ai-oil-falls-live-updates">Business live – latest updates</a></p><p>Airlines have called for “action and accountability” over the UK’s air traffic control services after a technical issue led to flights being disrupted for the second time in a fortnight.</p>