In very awkward lighting 159012 arrives at Bath Spa station forming the 15.51 Bristol to London Waterloo service. South West have three variants of their liveries that illustrate the type of services that the particular train is dedicated to. In this case, 159012 bears a large white area to its flank indicating that this unit is designated a 'long distance' unit. I can understand why SWT operate to and from Exeter via Salisbury but I do find the Bristol to Waterloo services a little odd. I have not been able to find out the history of these services and why they form a part of their franchise agreement.
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