Britons heading to Spain have been told to expect chaos as staff at the country's largest airport have gone on strike.
Travellers have been warned they should arrive early at the airport in order to avoid missing their flights as they are likely to experience queues and delays.
Workers are undertaking industrial action at the Adolfo Suarez Madrid-Barajas airport, with the union saying it will be "indefinite and full-time".
The strike started after passenger control staff managed by the Trablisa company walked out during a dispute over working conditions.
Travellers have been told to expect queues and delays as a result of the strikes
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Around 800 personnel are employed at the airport, with many complaining their work is at saturation level and have demanded pay rises and compensation.
Alejandro Corredera Arriaga, spokesman for the Madrid strike committee, said the amount of work expected of Barajas workers "far exceeds" that at other Spanish airports.
Footage online showed the chaos which has ensued at the airport.
It is believed that some queues at passport control have been so long that tourists have missed flights and been left stranded.
TRAVEL WARNINGS - READ MORE:
Workers at Adolfo Suarez Madrid Barajas airport walked out over pay disputes
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On Sunday morning, it took 90 minutes longer than the week before to get through security.
One traveller posted on social media calling the scenes "crazy".
Meanwhile another posted: "Made it through Madrid airport... Chaos today as security employees decided to strike."
Airport authority AENA, which is state-owned, said: "Due to the strike called by Trablisa security staff at Madrid-Barajas Airport, security check times may be longer than usual.
Anti-tourist protests have swept Spain and the Canary Islands | REUTERS"We apologise for any inconvenience caused."
Spain has been rocked this year by anti-tourism protests, and the number of visitors has dropped as a result.
Hotspots such as Majorca have felt the lack of British tourists so much they are now pleading for people to return.
It is believed bar owners in Magaluf have suffered a year-on-year loss of up to 40 per cent.
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