'Corporations in the UK who used a secret "blacklisting" database to screen out ‘left wing trouble-makers’ and union sympathizers as potential job recruits are facing renewed scrutiny after the UK-activist group Liberty called for a fresh investigation Monday night.

A demonstration outside the Olympic site on March 1, 2011 was called in solidarity with the whistleblower who was fired for standing up for an illegally blacklisted workmate. The blacklist scandal first broke in 2008, when the UK media revealed that more than 40 leading employers had subscribed to the vetting service provided by The Consulting Association, which had surveillance files on more than 3,200 workers, including political activists, shop stewards and health and safety representatives.

Police seized the database three years ago and Ian Kerr, the founder of The Consulting Association, was fined only about $7,500. Invoices were discovered showing that 44 companies had paid to access the names on the list.'

Read more: Thousands of UK Workers 'Blacklisted' Over Political Views