A fire next to the track in the Seer Green area means all lines are blocked between West Ruislip and High Wycombe.
Trains will be cancelled or revised. Disruption is expected until 20:15.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner
Twitter:
If you would like to follow this incident on Twitter, please use #SeerGreen
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.
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