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The number of trains that arrive on time has risen dramatically since we took over the running of Britain's railway in October 2002
The Public Performance Measure (PPM) shows the percentage of trains which arrive at their destination on time.
PPM combines figures for punctuality and reliability into a single performance measure. It is the industry standard measurement of performance.
The national Public Performance Measure is 93.0%.
This compares to 93.3% for the same period last year.
The moving annual average (MAA) is 90.9%.
The table below shows the average Public Performance Measure for Britain as a whole and by train operating company. The moving annual average (MAA) is calculated over the 365 days to 27 April 2013.
A breakdown of each operator's performance, known as sub-operator PPM, is available to download:
Sub-operator PPM, Period 1 2013/14
Right-time performance measures the percentage of trains arriving early or within 59 seconds of schedule.
The moving annual average (MAA) is calculated over 365 days to 27 April 2013.
Note: unless specified otherwise, all data on and linked from this page is for initial indications only and is subject to change in subsequent publications.
PPM measures the performance of individual trains advertised as passenger services against their planned timetable as agreed between the operator and Network Rail at 22:00 the night before. PPM is therefore the percentage of trains 'on time' compared to the total number of trains planned.
A train is defined as on time if it arrives at the destination within five minutes (ie 4 minutes 59 seconds or less) of the planned arrival time for London and South East or regional services, or 10 minutes (ie 9 minutes 59 seconds or less) for long distance services.
Where a train fails to run its entire planned route calling at all timetabled stations it will count as a PPM failure.
Heathrow Express, Grand Central, Hull Trains and Eurostar are not included in the national PPM.
Please note that Greater Anglia took over the operation of the Greater Anglia franchise (formerly run by National Express East Anglia) on 5 February 2012.