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 8 (12 October - 8 November) 

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) 4.48% 4.17% 1.15% 0.28% 2.90%
Total percentage of services cancelled 7.41% 6.20% 4.45% 0.28% 5.65%
Delay minutes per 1000 miles (caused by SWR) 22.97 21.47 12.24 14.77 16.31
Percentage of stations cancellations 5.49% 5.50% 3.74% 0.24% 4.89%
Percentage of services on time 53.11% 61.63% 53.55% 92.66% 56.90%
Percentage of services up to 3 minutes delayed 76.48% 82.07% 73.10% 98.95% 77.73%
Percentage of services up to 15 minutes delayed 98.22% 98.14% 95.69% 99.85% 97.37%
Number of short formations 123 131 75 0 329
Percentage of trains short formed 1.20% 0.89% 0.40% 0.00% 0.74%
Number of booked services 10235 14708 18717 702 44362
Services arriving between 30 and 59 minutes late at their final scheduled destination 18 45 207 0 270
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.18% 0.31% 1.11% 0.00% 0.61%
Services arriving between 60 and 119 minutes late at their final scheduled destination 7 13 63 0 83
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.07% 0.09% 0.34% 0.00% 0.19%
Services arriving 120 minutes late or more at their final scheduled destination 1 1 3 0 5
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.01% 0.01% 0.02% 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) 2.09% 2.34% 1.18% 2.35% 1.82%
Total percentage of services cancelled 4.58% 4.31% 3.45% 2.62% 3.96%
Delay minutes per 1000 miles (caused by SWR) 15.84 14.01 9.79 16.79 11.82
Percentage of Stations Cancellations 3.34% 3.96% 3.02% 2.39% 3.46%
Percentage of services on time 61.81% 66.00% 61.86% 92.88% 64.00%
Percentage of services up to 3 minutes delayed 83.11% 85.39% 79.21% 98.86% 82.97%
Percentage of services up to 15 minutes delayed 98.55% 98.85% 96.54% 99.87% 98.10%
Number of short formations 1522 3076 2635 0 7233
Percentage of trains short formed 1.24% 1.73% 1.21% 0.00% 1.36%
Number of booked services 128454 186934 227815 19672 562875
Services arriving between 30 and 59 minutes late at their final scheduled destination 211 347 1831 9 2398
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.16% 0.19% 0.80% 0.05% 0.43%
Services arriving between 60 and 119 minutes late at their final scheduled destination 51 67 303 2 423
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.04% 0.04% 0.13% 0.01% 0.08%
Services arriving 120 minutes late or more at their final scheduled destination 7 7 35 0 49
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.01% 0.00% 0.02% 0.00% 0.01%