A trespasser has caused disruption for train travellers heading between Norwich and Nottingham.
Network Rail said the police were called to a trespass incident at Peterborough this morning, with all lines blocked between Peterborough and Ely/Huntingdon.
Passengers on East Midlands Trains between Norwich and Nottingham and on Greater Anglia services between Peterborough and Ipswich are among thos affected, with delays of up to 40 minutes.
Network Rail said it is anticipating a good service will be operating again by about 10am today.
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