“Since entering passenger service, we’ve seen several technical issues associated with their long-term storage,” they added.<\/p>\n
“Since the introduction of our May timetable, Class 175 issues have accounted for nearly 15% of delay minutes and around 14% of cancellations.”<\/p>\n
Journey planners will be updated with the schedule changes in the coming days and customers with bookings on affected services will be contacted directly, GWR said.<\/p>\n
Additional moves to help tackle the problem will include trains undergoing extra assurance checks before returning to service after repairs.<\/p>\n
GWR said each train would be required to complete 1,000 fault-free miles in simulated passenger operation before re-entering service.<\/p>\n
It said a dedicated technical investigation team would be used to identify the root causes of recurring faults and strengthen maintenance arrangements.<\/p>\n
Last month, GWR managing director Mark Hopwood said customers were “right to be disappointed”<\/a> but said “we’re absolutely determined to sort this out”.<\/p>\n Follow BBC Cornwall on X, external<\/a>, Facebook, external<\/a> and Instagram, external<\/a>. Follow BBC Devon on X, external<\/a>, Facebook, external<\/a> and Instagram, external<\/a>. Send your story ideas to spotlight@bbc.co.uk, external<\/a>.<\/p>\n