Any concern, problem or complaint raised by an employee is known as a work-related grievance. Some of the most common workplace issues which result in grievances relate to:
discrimination
health and safety
bullying and harassment
changes to terms and conditions
new working practices
Before you raise a formal grievance, you should first talk to your employer informally to see if that solves the problem. If that fails to have the desired effect, then consider writing a formal grievance letter. Use a Grievance letter which should contain details of the workplace issue you have been experiencing, including the time it started, and demonstrate any steps you have taken to deal with the problem, along with proposals for tackling your grievance. You can use this letter to specify who you would like to accompany you to any subsequent formal meeting. For more information, read Employee grievances and raising grievances.
Always check your employer's handbook for employees, if there is one, and follow any Grievance procedure it sets out. Additionally, you should follow the Acas Code of Practice.