This is the best summary I could come up with:

Nats apologised for the fault just after midday on Monday, before it announced at 15:15 BST that it had identified and remedied the issue that was affecting its “ability to automatically process flight plans”.

Several airports across the UK, and airlines including Ryanair, EasyJet, Wizz Air, Loganair and Aer Lingus have all warned passengers of delays or cancellations to flights.

British Airways said it had to make “significant changes” to its schedule and advised passengers due to catch short-haul journey to check their flight’s status as it “may no longer be operating”.

British Airways said it was working with NATS to “understand the impact” of the issue, and said it will keep customers updated, while Aer Lingus urged passengers to check their flight status before going to the airport as “delays and cancellations are likely”.

Irish minister of state for transport Jack Chambers warned of a “major” knock-on impact on flights to and from Ireland as a consequence of the issues in the UK.

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