Carillion was a British construction and facilities management company that was formed in 1999. It became one of the largest construction firms in the UK, involved in various projects including roads, schools, and hospitals. The company was known for its public-private partnerships and worked on significant infrastructure projects. In January 2018, Carillion went into liquidation, leading to thousands of job losses and significant financial repercussions for suppliers and subcontractors. The collapse raised concerns about corporate governance and the management of large contracts, prompting investigations and discussions about the future of similar companies in the construction industry.