Microsoft Warns: Shadow AI Rampant in UK Offices

Most UK employees are now using unapproved AI tools at work every week, according to new Microsoft research, raising fresh questions about security, privacy, and corporate control over artificial intelligence.

What Microsoft Found

Microsoft’s latest UK study reports that 71 per cent of employees have used unapproved consumer AI tools at work, and 51 per cent continue to do so weekly. The research, conducted by Censuswide in October 2025, highlights a growing trend known as “Shadow AI”, i.e., the use of artificial intelligence tools not sanctioned by employers. The (October 2025) Censuswide survey took account of the views of 2,003 UK employees, aged 18 and over. The sample included workers from financial services, retail, education, healthcare, and other sectors, with at least 500 respondents each from large businesses and public sector organisations.