Is an employee who does not submit a written grievance barred from bringing a tribunal claim based on his or her complaint?

There is no statutory procedure requiring employees to present a written grievance to their employer before bringing a tribunal claim. However, a failure by an employee to raise a grievance may still be relevant to a tribunal claim based on the complaint as the Acas code of practice on disciplinary and grievance procedures provides that employees should raise grievances formally and in writing with their employer. An unreasonable failure to comply with the code may result in a reduction to any compensation that the tribunal awards to the employee of up to 25%.