The Independent Workers' Union of Great Britain (IWGB)

The Independent Workers' Union of Great Britain (IWGB)is a trade union in the United Kingdom.

The IWGB comprises eleven branches which organise workers within their chosen industry, run their own campaigns and have their own representative officials. Their members are predominantly low-paid migrant workers in London. The IWGB began as a breakaway from Unite and UNISON.

The dispute stemmed from disagreements over how to get better working conditions for cleaners at the University of London, and, more broadly, about how to run modern trade unions. The IWGB is one of the main trade unions in challenging employment law relating to the 'gig economy'.