It's not specific, but from First Great Western JourneyCheck:
Cancellations to services between Chippenham and Swindon
Owing to flooding between Chippenham and Swindon trains have to run at reduced speed.
Train services running through these stations may be cancelled or delayed at short notice. An estimate for the resumption of normal services will be provided as soon as the problem has been fully assessed.
Message Received: 04/01/2014 12:12