Disruptions on First Great Western between London Paddington and Cheltenham Spa, between London Paddington and Newbury and between London Paddington and Didcot Parkway due to flooding at Maidenhead.
Tickets being accepted on National Rail and Underground services.
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Freezing conditions have caused 24 hours of cross-channel travel chaos - which is set to continue into tonight.
The icy conditions has put a strain on many services in the South, especially those that help the elderly.
School children in Hampshire are performing the story of Mary and Joseph using songs by Take That.