This morning trains were late and cancelled after the extended work, a signal failure and a broken down train. With trains and crew in the wrong place it has taken the company all day to recover and there are still delays tonight.
Some drivers cannot work because they have gone over the hours they allowed to be in the cab for health and safety reasons. More details of the changes will be announced shortly.
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British Airways said it was taking the matter "extremely seriously" and is assisting police with their enquiries.
Firefighters in Abingdon have carried out a rather unusual rescue after a 17 year-old bellringer became tangled in bell ropes.
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