By Tom Worden for MailOnline
Published: 16:24 BST, 1 August 2017 | Updated: 16:24 BST, 1 August 2017
British holidaymakers faced further travel misery today as security staff at Barcelona airport took industrial action causing long queues and missed flights.
Staff at the El Prat airport were working to rule and deliberately taking the maximum of ten minutes to pass each passenger through security.
The industrial action during peak holiday season has caused around 1,000 people to miss flights at the airport in the past few days, airline bosses said.
Staff at the El Prat airport (pictured) were working to rule and deliberately taking the maximum of ten minutes to pass each passenger through security.
Around 350 staff from the private firm Eulen Seguridad work at the airport controlling queues, operating scanners and searching passengers.
They want increased staffing levels and improved working conditions, saying they are stressed and work up to 16 hours a day.
Mediation between the workers and their bosses at Eulen, at the Catalonia Labour Tribunal, broke down on Monday.
Spanish media reported the staff are taking unofficial action including delaying passengers for ten minutes each as they pass through security.
And increased action, including short hour-long strikes at key points of the day, are expected to begin on Friday.
A spokesman for the Spanish airlines association Aceta said the action was 'causing delays at security controls that are causing some companies to delay flights so they can wait for passengers stuck in queues'.
They said up to 30 per cent of flights are being delayed at the airport - because some are missing up to 50 passengers when due to take off.
This was the scene at Paris's Orly airport last week, where some reported 80-minute delays
British holidaymakers have been left queuing at passport checks at European airports for up to four hours after tougher new border rules were imposed by the EU.
Airports popular with British tourists, including Paris, Madrid and Lisbon, have seen queues stretching hundreds of yards as the stricter checks are imposed on entry and exit.
Some airports have reported long delays to planes taking off while crews wait for passengers to pass the border, and other travellers are said to have missed their flights while standing in line.
Palma airport in Majorca, which is inundated with British