Update 2023-08-28 (2): According to updates, the technical issue has been found and fixed. Over 500 flights were cancelled due to the technical issue. Airlines and airports are working on managing the affected flights.
Update 2023-08-28 (1): According to media reports, more than 300 flights were cancelled throughout the UK due to the technical problems. Short-haul flights in particular are said to be affected. It is expected that further flights will be cancelled, which have so far been considered delayed.