Our performance breakdown

Our latest punctuality and reliability performance breakdown

The four lines and which stations these include that are detailed in the tables below can be seen in this map:
Map of the South Western Railway network with the performance figures lines

Download a JPEG version of the map (287KB)


Performance data by metric — Period 10 (7 December - 3 January) 

The rail year runs from 1st April to 31st March and is split up into 13 four-week ‘periods’.

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Performance Measure Main Line Suburban Windsor Lines Main Line Island Line SWR Total
Percentage of services cancelled (caused by SWR) 3.01% 2.31% 1.14% 7.48% 2.18%
Total percentage of services cancelled 5.66% 3.94% 4.33% 7.48% 4.61%
Delay minutes per 1000 miles (caused by SWR) 29.88 16.39 15.44 11.18 18.05
Percentage of stations cancellations 4.37% 3.70% 3.55% 6.96% 3.88%
Percentage of services on time 57.33% 70.46% 53.44% 92.69% 61.64%
Percentage of services up to 3 minutes delayed 79.70% 87.99% 74.31% 98.88% 81.35%
Percentage of services up to 15 minutes delayed 98.22% 99.14% 95.81% 99.98% 97.77%
Number of short formations 133 118 215 0 466
Percentage of trains short formed 1.52% 0.91% 1.38% 0.00% 1.21%
Number of booked services 8739 12947 15547 1317 38550
Services arriving between 30 and 59 minutes late at their final scheduled destination 26 13 196 0 235
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.30% 0.10% 1.26% 0.00% 0.61%
Services arriving between 60 and 119 minutes late at their final scheduled destination 7 0 40 0 47
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.08% 0.00% 0.26% 0.00% 0.12%
Services arriving 120 minutes late or more at their final scheduled destination 3 0 1 0 4
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.03% 0.00% 0.01% 0.00% 0.01%

Moving Annual Average (performance data by metric)

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Performance Measure Main Line Suburban Windsor Lines Main Line Island Line SWR Total
Percentage of services cancelled (caused by SWR) 2.13% 2.21% 0.99% 2.69% 1.71%
Total percentage of services cancelled 4.43% 4.13% 3.24% 2.69% 3.79%
Delay minutes per 1000 miles (caused by SWR) 16.48 13.51 9.15 16.85 11.44
Percentage of Stations Cancellations 3.20% 3.76% 2.79% 2.50% 3.27%
Percentage of services on time 62.08% 67.87% 61.86% 92.81% 64.78%
Percentage of services up to 3 minutes delayed 83.41% 86.76% 79.58% 98.87% 83.69%
Percentage of services up to 15 minutes delayed 98.91% 98.99% 96.88% 99.87% 98.28%
Number of short formations 1694 2983 2436 0 7113
Percentage of trains short formed 1.32% 1.59% 1.07% 0.00% 1.34%
Number of booked services 128298 187326 227309 18946 561879
Services arriving between 30 and 59 minutes late at their final scheduled destination 182 305 1624 9 2120
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.14% 0.16% 0.71% 0.05% 0.38%
Services arriving between 60 and 119 minutes late at their final scheduled destination 40 59 289 2 390
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.03% 0.03% 0.13% 0.01% 0.07%
Services arriving 120 minutes late or more at their final scheduled destination 9 6 29 0 44
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.01% 0.00% 0.01% 0.00% 0.01%