Senior HR Advisor (Operations) - ContractLocation: HybridDuration: Initial 3-6 months (likely extension)Day Rate / Salary: 248 Per Day (inside IR35) The Opportunity A large, complex organisation is seeking an experienced Senior HR Advisor to join on a contract basis to support a busy HR operations function. This role is well suited to an HR professional who thrives in fast-paced, unionised environments and is confident managing complex employee relations casework from day one.You will act as a trusted advisor to senior leaders, providing pragmatic, legally sound HR guidance while supporting change initiatives and operational priorities. Key Responsibilities Provide expert HR advice across the full employee lifecycle, including:Disciplinary, grievance, performance, absence, redundancy, and organisational changeEquality, discrimination, bullying and harassment mattersRecruitment, retention, and employment legislation (including TUPE)Manage and progress a varied caseload, including complex and high-risk ER mattersLead and support investigations, hearings, appeals, and formal HR processesPrepare and present HR input at meetings, panels, and hearingsWork constructively with trade unions and employee representativesSupport organisational change programmes in line with policy and best practiceContribute to HR policy interpretation, development, and implementationSupport or lead HR project work, including data analysis and reportingProvide guidance and informal mentoring to HR collea