"The construction industry blacklist has appeared regularly in the media since it was discovered in 2009 following a raid by the Information Commissioners Office (ICO). Over 40 of the UKs largest contractors held a covert
“The construction industry blacklist has appeared regularly in the media since it was discovered in 2009 following a raid by the Information Commissioners Office (ICO). Over 40 of the UKs largest contractors held a covert database of trade unionists who had complained about unpaid wages or safety on building sites through an organisation called The Consulting Association.”
See the article: Six years and still waiting: the legal implications of blacklisting (The Justice Gap, link)
And see: Every Man a Capitalist: The long history of monitoring unsuitable workers in the UK (Statewatch database)