Recent reports of planned industrial action by London Underground drivers have drawn attention to an issue that is increasingly arising in workplaces across the UK: changes to working patterns and working hours.
The dispute reportedly relates to proposals to introduce a compressed four-day working week, which some drivers believe could lead to longer shifts and changes to existing working arrangements.
While this situation relates to a particular sector, it highlights wider questions that arise across many organisations. Employers are increasingly considering flexible working arrangements, compressed working weeks and alternative shift patterns as part of modern workforce planning.
Where such changes affect existing contractual arrangements, employment law considerations become important.
Can Employers Change Working Hours?
In many cases, an employee’s working hours and working pattern are set out in their employment contract.
As a general principle, contractual terms cannot normally be changed without the agreement of the employee, unless the contract itself contains a clause allowing certain variations.
If an employer seeks to impose changes without agreement, this may potentially give rise to legal issues including:
- breach of contract
- constructive dismissal claims
- employee grievances
- workplace disputes
In practice, employers wishing to introduce changes to working patterns will usually need to consult with employees and seek agreement before implementing new arrangements.
The Rise of Compressed and Flexible Working
Across the UK, organisations are increasingly exploring alternative working arrangements, including:
- compressed working weeks
- flexible start and finish times
- hybrid working arrangements
- staggered working hours
These arrangements can offer benefits such as improved work-life balance, increased employee satisfaction and, in some cases, improved productivity.
However, where such changes alter existing contractual terms or working practices, employers should ensure that any changes are introduced in a legally compliant way.
The Importance of Consultation
Consultation is often an important part of implementing changes to working arrangements.
- Employers should generally aim to:
- explain proposed changes clearly
- allow employees the opportunity to raise concerns
- consider alternative solutions where appropriate
- provide reasonable notice before changes are implemented
Where a recognised trade union is present, employers may also have obligations under collective agreements to consult with the union regarding significant workplace changes.
Meaningful consultation can help reduce the risk of disputes and support constructive dialogue between employers and employees.
Working Time and Health and Safety Considerations
Changes to working patterns must also take into account wider legal obligations, including compliance with the Working Time Regulations 1998.
Key considerations may include:
- the 48-hour average weekly working time limit (unless an employee has opted out)
- minimum daily and weekly rest periods
- rest breaks during working hours
- additional protections relating to night work
Employers should also consider health and safety implications, particularly where longer shifts may increase the risk of fatigue.
Practical Steps for Employers
Where employers are considering changes to working patterns, it is generally advisable to:
- Review employment contracts carefully
- Identify whether any contractual variation clauses apply
- Consult with employees or representatives at an early stage
- Document any agreed changes in writing
- Consider operational, health and safety, and regulatory implications
- Obtain legal advice where necessary
Taking a structured and transparent approach can help minimise legal risk and maintain positive working relationships.
How Legal Advice Can Help
Changes to working arrangements can sometimes raise complex legal issues, particularly where contractual terms, collective agreements or statutory rights are involved.
Solicitors can assist with:
- reviewing employment contracts
- advising on proposed workplace changes
- supporting consultation processes
- managing employment disputes
- advising employers on compliance with employment legislation
Concerned About Changes to Your Working Hours?
If your employer has altered your working hours or patterns without proper consultation, our employment law team can help you understand your rights and options.
Disclaimer: This article is provided for general information purposes only and does not constitute legal advice. Specific legal advice should be sought in relation to individual circumstances.