Workers who had been branded troublemakers or who had been blacklisted by the construction giant Sir Robert McAlpine have brought a claim in the high court.

The workers claim that Sir Robert McAlpine (amongst others) had subscribed to a database run by the Consulting Association (an organisation allegedly funded by big construction companies to collect information about workers who are considered troublemakers) and used the information when deciding who to employ on projects.

Currently 86 out of the 3,400 workers who appear on the Consulting Association’s database have brought claims totalling £17m. It is estimated that if more of the workers on the list also bring claims then the potential claim could be around £600m.