The timetable for evening trains leaving from Didcot Parkway will be different until Friday due to engineering works.
Engineering work taking place between Tilehurst and Didcot Parkway means some lines will be closed on Tuesday to Thursday evenings.
The 7.23pm and 8.23pm Swansea to London Paddington services and the 9.02pm Oxford to London Paddington service will arrive and depart Reading a few minutes later than normal.
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The 8.25pm, 8.55pm and 9.25pm London Paddington to Didcot Parkway services will depart Reading and beyond a few minutes later than normal.
The 9.04pm Didcot to London Paddington service will also be operating a few minutes later than normal between Reading and Slough.
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The 9.3pm and 10.5pm Didcot Parkway to London Paddington services will depart at 9.44pm and 11.02pm respectively.
The last alteration is that the 10.24pm Didcot Parkway to Reading service will depart at 10.27pm instead.
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