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 11 (4 January - 31 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 service cancelled (caused by SWR) 1.65% 1.66% 0.60% 7.88% 1.45%
Total percentage of services cancelled 2.45% 2.63% 4.28% 7.88% 3.41%
Delay Minutes per 1000 miles (caused by SWR) 20 11.61 8.22 11.51 11.12
Percentage of Stations Cancellations 1.68% 2.29% 3.76% 7.01% 2.70%
Percentage of service on time 60.66% 73.73% 59.40% 93.81% 65.88%
Percentage of service up to 3 minutes delayed 82.83% 89.75% 78.95% 99.06% 84.51%
Percentage of services up to 15 minutes delayed 99.02% 99.35% 96.97% 99.94% 98.49%
Number of short formations 124 37 176 0 337
Percentage of trains short formed 1.26% 0.26% 1.10% 0.00% 0.82%
Number of booked services 10189 14736 16958 1427 43310
Services arriving between 30 and 59 minutes late at their final scheduled destination 9 3 83 0 95
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.09% 0.02% 0.49% 0.00% 0.22%
Services arriving between 60 and 119 minutes late at their final scheduled destination 1 0 16 0 17
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.01% 0.00% 0.09% 0.00% 0.04%
Services arriving 120 minutes late or more at their final scheduled destination 0 0 2 0 2
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.00% 0.00% 0.01% 0.00% 0.00%

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) 2.13% 2.17% 0.97% 3.19% 1.71%
Total percentage of services cancelled 4.33% 4.01% 3.36% 3.19% 3.80%
Delay Minutes per 1000 miles (caused by SWR) 16.83 13.65 9.16 16.16 11.54
Percentage of Stations Cancellations 3.14% 3.62% 2.91% 2.96% 3.25%
Percentage of service on time 62.06% 68.53% 61.89% 92.88% 65.03%
Percentage of service up to 3 minutes delayed 83.40% 87.05% 79.69% 98.89% 83.84%
Percentage of services up to 15 minutes delayed 98.91% 99.02% 96.87% 99.87% 98.29%
Number of short formations 1799 2972 2436 0 7207
Percentage of trains short formed 1.47% 1.68% 1.13% 0.00% 1.35%
Number of booked services 129280 187755 226977 18548 562560
Services arriving between 30 and 59 minutes late at their final scheduled destination 177 284 1621 7 2089
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.14% 0.15% 0.71% 0.04% 0.37%
Services arriving between 60 and 119 minutes late at their final scheduled destination 41 53 293 2 389
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 28 0 43
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.01% 0.00% 0.01% 0.00% 0.01%