There are delays and cancellations on Chiltern Railway services this morning after major signalling problems.
Earlier signalling problems between Banbury and London Marylebone meant that all trains between the two stations were cancelled.
The line has just re-opened and the fault has been fixed, but trains may be cancelled or delayed by up to an hour at short notice.
Virgin Trains, First Great Western and London Midland services are accepting Chiltern Rail tickets on reasonable routes and tickets are being accepted on the London Underground.
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