LONDON — Train drivers across Great Britain are considering strike action over inadequate access to toilet facilities, putting fresh pressure on rail operators to resolve a long-running workplace welfare dispute.

The Aslef union says drivers continue to face difficulties accessing suitable toilets during shifts, despite a welfare charter introduced last year after concerns were raised about basic workplace conditions.

Unions say progress has stalled, with some drivers reportedly forced to manage long periods without adequate toilet access. They argue that the situation can create health and safety concerns, particularly when workers limit their fluid intake during lengthy shifts.

The dispute could develop into industrial action involving major rail operators. Upcoming strike ballots at LNER and Avanti are among the developments being closely watched, while other transport unions are also calling for improvements.

The Office of Rail and Road has previously highlighted problems with the implementation of welfare measures, including inconsistent progress and poor coordination.

The dispute now presents a challenge for Britain's rail industry as operators attempt to improve working conditions while avoiding further disruption to passengers. If negotiations fail, commuters could face additional uncertainty over future rail services.