A Lumo spokesperson said: “We have been experiencing some issues with the reliability of some of our toilet facilities onboard our West Coast services.”
They added that they were working closely with rail company Alstom, which refurbished the carriages used by Lumo, to “rectify the issue”.
An Alstom spokesperson said: “We recognise that this falls short of the standard fare-paying passengers should expect, particularly on long-distance services.
“Working closely with Lumo, we are reviewing the entire fleet position to reduce the risk of repeat failures, improve overnight servicing checks, and ensure toilet availability is restored and maintained wherever possible on the operator’s West Coast route.”
The 06:11 departure from London Euston on Friday, which was affected, ran with a 58-minute delay and terminated at Motherwell, North Lanarkshire.
Passengers were told their tickets would be accepted on ScotRail services.
