Trains between Ipswich and Peterborough are being delayed or altered at short notice because of emergency engineering works.
Services will now no longer call at March or Whittlesea and will start from and terminate at Ely instead of Peterborough.
The 10am and 11.58am Ipswich to Peterborough and 11.45am and 1.45pm Peterborough to Ipswich services are all affected.
Greater Anglia tickets between Ely and Peterborough are being accepted on CrossCountry and East Midlands services during the works.
No time has been set for normal services to resume.
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