Employment Rights Act 1996: Primary legislation that sets out the basic framework for handling workplace grievances, defines employee rights regarding grievance procedures, and outlines requirements for fair treatment

ACAS Code of Practice on Disciplinary and Grievance Procedures: Provides practical guidance on handling grievances. While not legally binding, tribunals consider it and failure to follow can result in up to 25% increase in compensation if case goes to tribunal

Equality Act 2010: Covers grievances involving discrimination, protected characteristics, and equal treatment obligations in the workplace

Health and Safety at Work Act 1974: Relevant for grievances involving workplace safety issues and employer's duty of care obligations

Data Protection Act 2018 and UK GDPR: Governs the handling of personal information during grievance process and specifies record keeping requirements

Protection from Harassment Act 1997: Applicable legislation when grievance involves workplace harassment

Public Interest Disclosure Act 1998: Relevant legislation when grievance involves whistleblowing matters