Rail delays of up to an hour, alterations and cancellations are expected this afternoon after a person was hit by a train between London Paddington and Reading.
Services through Maidenhead and Burnham area are disrupted.
Services from London Paddington to and from Greenford, Slough and to and from Winsdor, and Heathrow Connect services, are operating normally.
First Great Western said customers can use services on Chiltern Trains, CrossCountry and South West Trains.
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