The French energy group Total has fired around 900 construction workers who were building a new facility at oil refinery in the UK.
Total said the builders at the Lindsey refinery in eastern England were sacked because they had been on an unofficial strike for over a week, which is illegal under British law.
The walkout began on 11th June. It started after 65 workers were told they would be laid off when part of the project was completed while at the same time others were being hired for a subsequent phase.
The dispute has sparked sympathy strikes at energy facilities across Britain.
The same refinery was the scene of strikes and protests in February over the use of foreign workers to build facilities there and at other power plants.