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 6 (23 August - 19 September

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) 1.11% 1.15% 0.54% 2.36% 0.93%
Total percentage of services cancelled 3.68% 3.31% 2.12% 2.36% 2.89%
Delay Minutes per 1000 miles (caused by SWR) 10.79 9.21 7.28 31.53 8.49
Percentage of Stations Cancellations 2.44% 2.84% 1.65% 1.83% 2.33%
Percentage of service on time 68.17% 75.03% 53.72% 86.74% 66.38%
Percentage of service up to 3 minutes delayed 86.11% 90.14% 73.97% 97.18% 83.85%
Percentage of services up to 15 minutes delayed 98.34% 99.23% 97.19% 99.91% 98.34%
Number of short formations 49 197 114 0 360
Percentage of trains short formed 0.51% 1.42% 0.67% 0.00% 0.86%
Number of booked services 10222 14559 17551 1400 43732
Services arriving between 30 and 59 minutes late at their final scheduled destination 40 30 130 1 201
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.39% 0.21% 0.74% 0.07% 0.46%
Services arriving between 60 and 119 minutes late at their final scheduled destination 13 3 8 0 24
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.13% 0.02% 0.05% 0.00% 0.05%
Services arriving 120 minutes late or more at their final scheduled destination 0 0 7 0 7
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.00% 0.00% 0.04% 0.00% 0.02%

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) 1.97% 1.78% 0.96% 3.19% 1.54%
Total percentage of services cancelled 4.98% 4.17% 4.08% 3.19% 4.29%
Delay Minutes per 1000 miles (caused by SWR) 17.46 12.98 9.59 18.04 11.79
Percentage of Stations Cancellations 3.60% 3.64% 3.52% 2.83% 3.58%
Percentage of service on time 62.01% 72.67% 57.16% 91.12% 65.07%
Percentage of service up to 3 minutes delayed 82.48% 88.24% 75.72% 98.61% 82.77%
Percentage of services up to 15 minutes delayed 98.37% 98.81% 96.03% 99.92% 97.79%
Number of short formations 981 1590 2375 0 4946
Percentage of trains short formed 0.79% 0.88% 1.09% 0.00% 0.92%
Number of booked services 132311 192784 231782 18080 574957
Services arriving between 30 and 59 minutes late at their final scheduled destination 388 340 2185 6 2919
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.29% 0.18% 0.94% 0.03% 0.51%
Services arriving between 60 and 119 minutes late at their final scheduled destination 97 110 442 2 651
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.07% 0.06% 0.19% 0.01% 0.11%
Services arriving 120 minutes late or more at their final scheduled destination 11 6 38 0 55
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.01% 0.00% 0.02% 0.00% 0.01%