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 2 (3 May - 30 May) 

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 service cancelled (caused by SWR) 1.37% 1.48% 1.48% 2.03% 1.47%
Total percentage of services cancelled 9.50% 6.79% 6.87% 2.03% 7.29%
Delay Minutes per 1000 miles (caused by SWR) 17.45 13.71 11.72 21.47 13.23
Percentage of Stations Cancellations 7.16% 6.67% 6.41% 1.99% 6.63%
Percentage of service on time 61.27% 74.81% 53.60% 90.90% 64.64%
Percentage of service up to 3 minutes delayed 79.94% 87.52% 70.73% 98.62% 80.26%
Percentage of services up to 15 minutes delayed 95.88% 97.25% 91.77% 99.86% 95.15%
Number of short formations 61 69 169 0 299
Percentage of trains short formed 0.68% 0.51% 1.08% 0.00% 0.76%
Number of booked services 10095 14740 17593 1432 43860
Services arriving between 30 and 59 minutes late at their final scheduled destination 97 60 409 2 568
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.96% 0.41% 2.32% 0.14% 1.30%
Services arriving between 60 and 119 minutes late at their final scheduled destination 30 71 142 0 243
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.30% 0.48% 0.81% 0.00% 0.55%
Services arriving 120 minutes late or more at their final scheduled destination 2 3 12 0 17
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.02% 0.02% 0.07% 0.00% 0.04%

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 service cancelled (caused by SWR) 2.05% 2.00% 1.00% 3.85% 1.66%
Total percentage of services cancelled 4.95% 4.22% 4.05% 3.85% 4.31%
Delay Minutes per 1000 miles (caused by SWR) 18.03 13.63 9.54 19.31 11.99
Percentage of Stations Cancellations 3.65% 3.84% 3.54% 3.45% 3.68%
Percentage of service on time 60.64% 70.51% 59.99% 91.95% 64.79%
Percentage of service up to 3 minutes delayed 82.06% 87.45% 77.96% 98.70% 83.07%
Percentage of services up to 15 minutes delayed 98.52% 98.84% 96.21% 99.87% 97.90%
Number of short formations 1420 2311 2459 0 6190
Percentage of trains short formed 1.15% 1.28% 1.13% 0.00% 1.15%
Number of booked services 131267 191671 231737 18115 572790
Services arriving between 30 and 59 minutes late at their final scheduled destination 330 334 2111 10 2785
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.25% 0.17% 0.91% 0.06% 0.49%
Services arriving between 60 and 119 minutes late at their final scheduled destination 98 127 485 2 712
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.07% 0.07% 0.21% 0.01% 0.12%
Services arriving 120 minutes late or more at their final scheduled destination 15 9 40 0 64
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.01% 0.00% 0.02% 0.00% 0.01%