There is disruption on First Great Western between Worcester Shrub Hill and Swindon, and between Worcester Shrub Hill and Oxford because of a derailed train.
Some lines are now blocked as the train is re-railed which could take up until 2.30pm.
Replacement buses are running between Worchester Shrub Hill and Cheltenham and journeys will be delayed by up to half an hour.
More top news
Team SCA, which includes two sailors from Hampshire, has passed Cape Horn in the Volvo Ocean Race. They paid tribute to their late coach.
Delays are expected around the region over the Easter break. Rail engineering works mean that some services are suspended.
Thursday mornings weather for the east of the region