In recent years the passenger train performance on the Wrexham-Bidston line has generally been worse than that of ATW as a whole and, with the exception of periods 18/03, 18/04 and 18/07, consistently worse than that achieved by Merseyrail
 
The UK railway industry monitors performance using the Public Performance Measure (PPM).  Details of how the PPM is calculated and figures for each of the train operators can be found on the Office of Road and Rail website 
www.orr.gov.uk.  As PPM is based on the arrival time of services at their final station, it does not fully reflect performance at intermediate stations.

On the Wrexham-Bidston line, late running trains are often turned back to Wrexham at Shotton to reduce delays; the WBRUA is therefore capturing the percentage of services which do not run in each PPM reporting period between Bidston and Shotton alongside the official PPM data.  Details of PPM for the Wrexham-Bidston service alongside the overall PPM for ATW and Merseyrail together with the percentage of trains cancelled between Bidston and Shotton are shown in the chart below.


[click to enlarge]



Wrexham-Bidston Service reliability

Live trains

The WBRUA also monitors service performance for the Bidston to Neston journey each calendar month. Detailed performance information from November 2015 to October 2017 can be found here.
 
When rail replacement buses operate instead of trains, they cannot maintain the railway timetable between stations and intending passengers have difficulty knowing when a rail replacement bus will appear.  A rail replacement bus is likely to take two hours from Wrexham to Bidston whereas the train is timetabled to do the journey in just under an hour!