South Wales-London rail delays due to Reading revamp
Rail passengers between south Wales and London can expect their journey to take up to 90 minutes longer over the Easter weekend due to work at Reading station.
Services into and from London Paddington will go via Oxford, adding around one hour 30 minutes to journeys.
The delays began at 23:45 GMT on Thursday and run until 04:00 BST on Tuesday 2 April and are repeated the following weekend.
Reading railway station is undergoing a £895m upgrade set to finish by 2016.
Rail replacement buses will operate between Swindon and Reading for passengers travelling to and from Reading station.
The original aim of the station revamp was to complete the work by the end of 2016 but it is now scheduled to finish by the end of 2015.
In a statement, Network Rail said: "While we endeavour to run trains wherever we can during improvement works, the massive scale of this project means that the majority of services in the Reading area will be amended over the Easter period.
"We will be running special services over diversionary routes and providing alternative transport to minimise inconvenience as much as possible, although some journeys may take longer than usual."