Great Western Railway (GWR) said lines on the route are blocked while emergency services respond to the incident, with disruption expected to continue until the end of the day. A GWR spokesperson said: "We're working with Network Rail and the emergency services to deal with the incident as sensitively, quickly and safely as possible. "Some trains will be revised, only completing parts of their normal journeys, and there will also be some cancellations." Passengers choosing to use local bus services instead can purchase a ticket and later claim a refund from GWR if bus operators are not accepting rail tickets. Anyone affected by this incident who needs support can contact Samaritans free of charge on 116 123, at any time.