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 13 (1 March - 31 March) 

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) 1.26% 1.20% 0.63% 2.22% 1.01%
Total percentage of services cancelled 2.72% 2.04% 2.99% 2.22% 2.58%
Delay Minutes per 1000 miles (caused by SWR) 12.7 9.92 6.5 24.57 8.43
Percentage of Stations Cancellations 1.83% 1.82% 2.54% 2.21% 2.07%
Percentage of service on time 66.38% 78.51% 65.64% 91.07% 71.39%
Percentage of service up to 3 minutes delayed 86.97% 92.09% 82.53% 98.92% 87.74%
Percentage of services up to 15 minutes delayed 99.27% 99.53% 97.32% 99.93% 98.73%
Number of short formations 70 110 165 0 345
Percentage of trains short formed 0.64% 0.65% 0.82% 0.00% 0.70%
Number of booked services 11401 17356 21055 1732 51544
Services arriving between 30 and 59 minutes late at their final scheduled destination 9 2 148 1 160
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.08% 0.01% 0.70% 0.06% 0.31%
Services arriving between 60 and 119 minutes late at their final scheduled destination 0 0 13 1 14
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.00% 0.00% 0.06% 0.06% 0.03%
Services arriving 120 minutes late or more at their final scheduled destination 0 0 0 0 0
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.00% 0.00% 0.00% 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) 2.09% 2.02% 0.94% 4.01% 1.66%
Total percentage of services cancelled 4.79% 4.13% 3.79% 4.01% 4.14%
Delay Minutes per 1000 miles (caused by SWR) 17.53 13.73 9.13 19.31 11.67
Percentage of Stations Cancellations 3.29% 3.62% 3.10% 3.55% 3.36%
Percentage of service on time 61.08% 69.24% 61.35% 92.37% 64.86%
Percentage of service up to 3 minutes delayed 82.58% 87.04% 79.13% 98.74% 83.43%
Percentage of services up to 15 minutes delayed 98.74% 98.92% 96.60% 99.86% 98.11%
Number of short formations 1791 3109 2728 0 7628
Percentage of trains short formed 1.35% 1.61% 1.16% 0.00% 1.32%
Number of booked services 141498 205397 248814 19502 615211
Services arriving between 30 and 59 minutes late at their final scheduled destination 336 383 2567 14 3300
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.24% 0.19% 1.03% 0.07% 0.54%
Services arriving between 60 and 119 minutes late at their final scheduled destination 108 102 703 3 916
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.08% 0.05% 0.28% 0.02% 0.15%
Services arriving 120 minutes late or more at their final scheduled destination 18 9 43 0 70
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.01% 0.00% 0.02% 0.00% 0.01%