All services between Penzance and Newton Abbot have been suspended due to signalling problemsat Liskeard.
The cancelations are due to multiple lightning strikes to signalling equipment which has caused "significant damage".
Trains are unable to run between Penzance and Plymouth.
Tickets are being accepted on First Devon & Cornwall buses and CrossCountry services.
There is a very limited bus service in operation. Also affecting CrossCountry.
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