Common Models
| Model | Scheduling of Working Hours | Control Mechanism |
|---|---|---|
| Fixed working hours | Specified by the employer | Physical / digital attendance |
| Flexitime | Flexible within a defined bandwidth (core & bandwidth hours) | Working time balance / timesheets |
| Trust-based working hours | Fully flexible, outcome-oriented | Deliverables and objective achievement |
| Annualised hours | Distributed across the entire year | Annual hours balance |
| Shift work | According to shift rota / schedule | Shift rota and minimum staffing levels |
| Four-day week | Compressed hours or reduced hours | Weekly target / shift schedule |
Selection Criteria
Rather than following current workplace trends, operational requirements are the decisive factor: How significantly does workload fluctuate? Must staffing levels be guaranteed at specific times? How independently can employees plan their tasks? A model that does not align with the organisation's operational steering logic will inevitably be bypassed through informal arrangements.
Formal Requirements
Under Section 1 of the Employment Rights Act 1996 (ERA 1996), employers must provide a written statement of employment particulars on or before Day 1 of employment. The chosen working time model—including standard working hours, variable patterns, overtime rules, and shift arrangements—forms a mandatory part of these principal terms.
Furthermore, where collective agreements or recognised trade unions exist, or under the Information and Consultation of Employees (ICE) Regulations 2004, changes to working patterns, shift rotas, and working arrangements may require formal employee consultation or agreement.
Time Tracking & Recording
Regardless of the model chosen, employers retain legal duties under Regulation 9 of the Working Time Regulations 1998 (and aligned with the ECJ ruling C-55/18 CCOO) to maintain adequate records demonstrating compliance with:
- The 48-hour average weekly working limit (calculated over a standard 17-week reference period, unless an individual opt-out is signed under Regulation 5).
- Statutory daily rest (minimum 11 consecutive hours in each 24-hour period under Regulation 10).
- Statutory weekly rest (minimum 24 uninterrupted hours in each 7-day period or 48 hours per 14-day period under Regulation 11).
- Statutory rest breaks (minimum 20 minutes uninterrupted for working days exceeding 6 hours under Regulation 12).
- National Minimum Wage (NMWA 1998) compliance, ensuring that flexible or annualised working patterns never reduce average hourly pay below statutory thresholds.
Implementing a flexible or annualised working time model increases rather than decreases the demands placed on the recording system: without continuous, robust time tracking, it is impossible to demonstrate adequate compensatory rest, verify holiday pay entitlements, or prove compliance with statutory limits.
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