From http://news.bbc.co.uk/1/hi/england/norfolk/4102486.stm
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There were delays and cancellations on the Norwich to London Liverpool Street railway line on Friday morning after vandals cut through signal cables.
Train operator One said local services to Cambridge, Sheringham, Lowestoft, and Great Yarmouth were also affected.
The cables, between Norwich and Diss, were cut overnight and travellers have had half-hour delays.
Network Rail engineers were in the area but it was not known when the damaged cables would be repaired.
One spokesman Peter Meades said: "We are running services, but it means Network Rail have had to put in place some temporary signalling arrangements.
"This is not ideal because it means the trains won't be running at their normal speed and it also means we'll be thinning out the service in order just to keep trains moving."
He said passengers should be prepared for delays, particularly between Norwich, Diss and Stowmarket.
British Transport Police, who are investigating the vandalism, said the high voltage power lines were cut late on Thursday night or in the early hours of Friday at two separate locations in Newton Flotman.
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