One more time, failed talks with labor unions are disrupting operations at Heathrow Airport.

Striking security officers at Terminal Five have caused British Airways to cancel around 5% of flights for 10 days, from March 31 to April 9 (midnight Easter Sunday), and stop selling new tickets.

For existing customers, the union says the strikes will cause disruption to flights, but Heathrow says it has contingency plans to keep passengers moving along. Still, approximately 1,400 members of Unite who are expected to take part in the walkout will be replaced by 1,000 extra staff being added by the airport.

Elsewhere in Europe, EasyJet cabin crew in Portugal have voted to strike April 1-3, and a wave of strikes by air traffic controllers continues to affect operations in France.