Our performance

Our latest punctuality and reliability figures

At South Western Railway we know that you want a safe, reliable, punctual service. We’re committed to providing this, to help deliver the best service we can.

We continually measure our service reliability and punctuality and report on how we are performing against targets which are set in our Passenger’s Charter.

All our services are monitored every day, including Sundays and Bank Holidays and we have a range of performance metrics in place to measure the levels of performance we are delivering to our customers including;

Public Performance Measure (PPM) – the percentage of Passenger Services that arrive at their final scheduled destination within five minutes of the advertised time, without being subject to any form of cancellation.

Cancellations and Significant Lateness (CaSL) - the percentage of Passenger Services which are cancelled, or arrive significantly late at their final scheduled destination. Significantly late defined as 30 or more minutes late.

All Cancellations – the number of Passenger Services which are cancelled for all or part of their planned schedule including those services that Fail to Call at any intermediate stations on route as planned.

All Cancellations excluding Failures to Call – the number of Passenger Services which are cancelled for all or part of their planned schedule excluding any cancellations caused by services Failing to Call at any intermediate stations on route as planned.

On Time – the number of Passenger Services that arrive early or within 1 minute of their final scheduled destination, without being subject to any form of cancellation.

Lateness – the percentage of Passenger Services which are late in arriving at their final scheduled destination, without being subject to any form of cancellation by; a) between 1 and 3 minutes (within 3 minutes), b) between 4 minutes and 15 minutes c) between 30 minutes and 59 minutes; d) between 60 minutes and 119 minutes; and e) 120 minutes or more.

Short Formations – the number of Passenger Services formed with fewer vehicles than specified in the Capacity Statement approved by the Department for Transport. Services cancelled in full or in part are excluded from this metric as they are already accounted for under various cancellation metrics.

Performance data by metric — Period 4 (26 June - 24 July 2022)

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Performance Measure Main Line Suburban Windsor Lines Main Line Island Line SWR Total
Percentage of services cancelled (caused by SWR) 0.77% 1.41% 0.97% 7.36% 1.26%
Total percentage of services cancelled 1.22% 2.86% 3.38% 7.44% 2.81%
Delay minutes per 1000 miles (caused by SWR) 8.84 10.44 8.04 60.21 9.00
Percentage of services on time 72.77% 65.01% 67.23% 78.75% 68.03%
Percentage of services up to 3 minutes delayed 90.60% 86.00% 82.30% 93.80% 86.10%
Percentage of services up to 15 minutes delayed 99.10% 99.10% 96.70% 99.30% 98.30%
Number of short formations 7 19 32 0 58
Percentage of trains short formed 0.07% 0.14% 0.20% 0.00% 0.14%
Number of booked services 10181 14319 16557 1290 42347
Services arriving between 30 and 59 minutes late at their final scheduled destination 17 22 170 1 210
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.17% 0.15% 1.03% 0.08% 0.50%
Services arriving between 60 and 119 minutes late at their final scheduled destination 8 0 39 0 47
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.08% 0.00% 0.24% 0.00% 0.11%
Services arriving 120 minutes late or more at their final scheduled destination 0 1 2 0 3
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.00% 0.01% 0.01% 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) 0.72% 0.84% 0.69% 4.23% 0.83%
Total percentage of services cancelled 2.20% 2.68% 2.78% 4.28% 2.64%
Delay minutes per 1000 miles (caused by SWR) 8.26 8.47 6 34.57 7.07
Percentage of services on time 76.08% 71.00% 71.12% 79.79% 72.50%
Percentage of services up to 3 minutes delayed 92.14% 89.66% 86.52% 95.66% 89.38%
Percentage of services up to 15 minutes delayed 99.39% 99.29% 98.19% 99.67% 98.97%
Number of short formations 363 831 468 0 1662
Percentage of trains short formed 0.30% 0.48% 0.23% 0.00% 0.33%
Number of booked services 125467 179962 209232 11787 526448
Services arriving between 30 and 59 minutes late at their final scheduled destination 117 216 967 9 1309
Percentage of services arriving between 30 and 59 minutes late at their final scheduled destination 0.09% 0.12% 0.46% 0.08% 0.25%
Services arriving between 60 and 119 minutes late at their final scheduled destination 39 34 158 0 231
Percentage of services arriving between 60 and 119 minutes late at their final scheduled destination 0.03% 0.02% 0.08% 0.00% 0.04%
Services arriving 120 minutes late or more at their final scheduled destination 9 12 36 0 57
Percentage of services arriving 120 minutes late or more at their final scheduled destination 0.01% 0.01% 0.02% 0.00% 0.01%