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Union Detriment Grievance Letter Template
How to raise a grievance for being treated unfairly because of union membership or activities — what to include, your legal rights, and a free letter generator.
← All Letter Templates · Trade Union Rights · Last updated 18 August 2026
This is free rights guidance, not legal advice. For advice specific to your situation, see our About page or contact Citizens Advice.
If you need to raise a grievance for being treated unfairly because of union membership or activities, a written letter is the recommended first step — it creates a clear record and shows you're pursuing the matter formally. Below is what a strong union detriment grievance should include, plus a free tool to generate yours.
What this letter needs to cover
- Describe the specific detriment with dates and facts
- State this is unlawful under section 146
- Request a formal grievance hearing within 5 working days
- Warn of tribunal claim if not resolved
See our full letter template library for related templates, or use our free checkers for guidance specific to your situation.
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