All Chiltern Railways lines were blocked this evening after a person was hit by a train near Denham.
Disruption is currently expected on all lines until at least 9.30pm while emergency services are on the scene.
The line into London has now reopened, but the line from London to Birmingham currently still remains closed as of 9.55pm.
Ticket acceptance has been agreed with Virgin for services between London and Birmingham and Great Western Railway for London to Oxford services.
Ticket acceptance is also in place with XC for services from Birmingham to Banbury and Reading.
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