Strike action has led to the cancellation of dozens of flights to and from the UK and Ireland by German airline Lufthansa.
Around 100 flights have been cancelled at airports in London, Manchester, Birmingham, Newcastle, Glasgow, Aberdeen, Edinburgh and Dublin.
The one-day strike, which is due to a pay dispute, will affect Frankfurt, Munich, Dusseldorf and Hamburg.
As a result, only about 20 of more than 1,650 scheduled short-haul flights will operate, long-haul services will also be hit.
Passengers affected by cancellations can re-book for free, Lufthansa said.
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