Question to the Department for Business and Trade:

To ask the Secretary of State for Business and Trade, what recent estimate he has made of of the number of employers in the (a) private and (b) public sector whose employees are members of an unrecognised trade union.

The Government does not hold information on the number of employers in the private and public sectors whose employees are members of an unrecognised trade union.

The Management and Wellbeing Practices Survey estimates the percentage of employers with recognised unions and employers with union members. The difference in percentages could be used as a proxy to estimate the percentage of employers whose employees are members of an unrecognised trade union.