A signalling problem left commuters stranded in Oxford this morning, as trains running to London were cancelled.
There were also delays of up to 45 minutes on the line between Oxford, Reading, and London and cancellations and delays on services via Didcot to and from Bristol and South Wales.
Delays were due to a fault in the Cholsey area. Disruption is expected to last until at least 11am due to trains and crews being out of position.
For the latest information, see the First Great Western website.
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