The Government has published several ancillary documents related to the trade union changes under the Employment Rights Act 2025 which is due to come into force on 18th February 2026:

Transitional and saving regulations also come into force on the same date. These relate to how the law applies in the period around these specific trade union-related measures coming into force. They address how to deal with certain cases that began under the Trade Union Act 2016 legal framework but are still in progress when the Employment Rights Act 2025 comes into force. Government guidance on these transitional provisions is provided in Trade Union Law: Transition to Employment Rights Act 2025.