When companies seek to restructure long-term incapacity benefits through collective bargaining agreements, courts must determine whether existing contractual protections successfully shield employees from any adverse consequences of such changes.
Background:
Five pilots, operating under the Transfer of Undertakings (Protection of Employment) Regulations (TUPE 1981 and 2006), brought a claim challenging adverse changes made to their permanent health insurance benefits following a medical incapacity that resulted in the loss of their certification of fitness to fly.
Their permanent health insurance scheme had provided generous terms until they reached pensionable age. However, due to rising insurance premiums driven by stricter regulatory requirements following the Germanwings disaster in 2015, the airline negotiated a replacement scheme known as pilots' income protection insurance with the recognised trade union, the British Airline Pilots Association (BALPA), in 2020. However, this replacement scheme significantly reduced benefits for legacy claimants after they reached the age of sixty. Their claim was dismissed by a High Court judge, prompting the pilots to appeal the decision.
Decision:
The Court of Appeal (CoA) dismissed the appeal, holding that the collective agreement reached between the airline and the trade union was fully entitled to vary the pilots' employment contracts, despite the protected benefit clause detailed within the handbook. The CoA ruled that the incorporation terms embedded within their employment contracts enabled a raft of changes agreed through collective bargaining, and that the protected benefit clause in paragraph 5.1 of the handbook operated strictly as a qualification to the employer's unilateral variation right rather than as a carve-out insulating employees from collectively agreed changes.
The CoA applied foundational contract law principles alongside relevant authorities, including Tesco Stores Ltd v USDAW [2024] and RMT v Tyne and Wear Passenger Transport Executive [2024], confirming that trade union negotiations are a valid means of restructuring employee benefits.
Implications:
This judgement emphasises the importance of understanding how collective bargaining agreements intersect with individual employment contracts and incorporated handbooks. This judgement provides essential clarity on how incorporation clauses in employment contracts operate alongside collective bargaining agreements, establishing that standard employee handbooks containing protective wording regarding legacy benefits will not automatically override changes agreed through formal union negotiations unless there is explicit, unambiguous language that renders such benefits immune from collective restructuring.
When financial pressures or regulatory shifts compel businesses to revise legacy benefit schemes, employers must ensure that the mechanisms for introducing new agreements—such as union negotiations and incorporation clauses—are legally robust and clearly distinguished from unilateral variation rights.
For employees, this ruling underscores the reality that benefits secured through workplace policies can be altered or replaced when a recognised trade union agrees to changes in the collective interest, highlighting why proactive legal guidance is essential during industrial negotiations, contract interpretation disputes, and employment restructuring processes.




